50m freestyle 50-54 MEN 
|
| time | swimmer | birth |
club | date | city | country |
| .26.76 | Peter Prijdekker | 1948 | Out to Swim (GBR) | 03-08-98 | Amersfoort | NED |
| .28.72 | David Ugarkovich | 1947 | Sacramento M.H.W. (USA) | 03-08-98 | Amersfoort | NED |
| .29.22 | Michael MacManus | 1946 | M.U.E. (???) | 03-08-98 | Amersfoort | NED |
| .30.71 | Paulo Figueiredo | 1946 | West Hollywood Aqul (USA) | 03-08-98 | Amersfoort | NED |
| .31.68 | Ferry Smit | 1947 | Aqua Novio '94 | 14-06-98 | Apeldoorn | NED |
| .31.95 | Henk Wisselo | 1947 | AZC Masters | 06-12-98 | Parijs | FRA |
| .32.06 | Randall Schiller | 1948 | USF Masters (???) | 03-08-98 | Amersfoort | NED |
| .32.76 | Ron Judd | 1945 | Team Auckland (NZL) | 03-08-98 | Amersfoort | NED |
| .32.89 | Joop van Eijk | 1947 | HHZV Plons | 03-08-98 | Amersfoort | NED |
| .32.90 | John Alexander | 1947 | Empire (USA) | 03-08-98 | Amersfoort | NED |
| * .33.93 | Donald Uijtenbogaart | 1947 | De Dolfijn | 20-06-98 | Casablanca | MAR |
| .34.21 | Ed Dijkkamp | 1945 | AZC Masters | 14-06-98 | Apeldoorn | NED |
| .35.44 | Willem Beyleveld | 1947 | AZ&PC Anova | 26-04-98 | Amersfoort | NED |
| .35.7- | Bert Wille | 1945 | AZC Masters | 13-06-98 | Apeldoorn | NED |
| .36.14 | Thomas van Rij | 1947 | Gay Swim Amsterdam | 03-08-98 | Amersfoort | NED |
| .38.06 | Menno Messelink | 1948 | Amsterdam | 03-08-98 | Amersfoort | NED |
| .38.52 | Bernd Langer | 1947 | Hellas | 07-11-98 | Grunstadt | GER |
100m freestyle 50-54 MEN 
|
| time | swimmer | birth |
club | date | city | country |
| .59.22 | Peter Prijdekker | 1948 | Out to Swim (GBR) | 06-08-98 | Amersfoort | NED |
| 1.05.30 | Duke Dahlin | 1948 | USF Masters (???) | 06-08-98 | Amersfoort | NED |
| 1.06.11 | Donald Uijtenbogaart | 1947 | De Dolfijn | 18-10-98 | Breda | NED |
| 1.06.65 | David Ugarkovich | 1947 | Sacramento M.H.W. (USA) | 02-08-98 | Amersfoort | NED |
| 1.06.83 | Richard Merritt | 1947 | Team NY Aquatic (USA) | 02-08-98 | Amersfoort | NED |
| 1.09.10 | Paulo Figueiredo | 1946 | West Hollywood Aqul (USA) | 06-08-98 | Amersfoort | NED |
| 1.10.01 | Ferry Smit | 1947 | Aqua Novio '94 | 18-10-98 | Breda | NED |
| 1.11.97 | Berend Westera | 1945 | Team Auckland (NZL) | 06-08-98 | Amersfoort | NED |
| 1.12.68 | Craig Coffin | 1948 | Team Orange County (USA) | 06-08-98 | Amersfoort | NED |
| 1.13.30 | John Alexander | 1947 | Empire (USA) | 06-08-98 | Amersfoort | NED |
| 1.14.59 | Henk Wisselo | 1947 | AZC Masters | 29-03-98 | Deauville | FRA |
| * 1.21.50 | Hans de Vree | 1947 | Aqua Novio '94 | 13-06-98 | Apeldoorn | NED |
| 1.25.05 | Willem Beyleveld | 1947 | AZ&PC Anova | 26-04-98 | Amersfoort | NED |
| 1.27.81 | Bernd Langer | 1947 | Hellas | 07-11-98 | Grunstadt | GER |
| * 1.39.84 | Bert Wille | 1945 | AZC Masters | 13-06-98 | Apeldoorn | NED |
| 1.40.18 | Gerard van Reijsen | 1948 | HHZV Plons | 06-08-98 | Amersfoort | NED |
| * 1.42.94 | Ed Dijkkamp | 1945 | AZC Masters | 13-06-98 | Apeldoorn | NED |
| * 1.58.95 | Arie van Woudenberg | 1947 | AZC Masters | 13-06-98 | Apeldoorn | NED |
200m freestyle 50-54 MEN 
|
| time | swimmer | birth |
club | date | city | country |
| 2.15.01 | Peter Prijdekker | 1948 | Out to Swim (GBR) | 04-08-98 | Amersfoort | NED |
| 2.19.79 | Donald Uijtenbogaart | 1947 | De Dolfijn | 15-08-98 | Vasteras | SWE |
| 2.25.47 | Duke Dahlin | 1948 | USF Masters (???) | 04-08-98 | Amersfoort | NED |
| 2.32.36 | Richard Merritt | 1947 | Team NY Aquatic (USA) | 04-08-98 | Amersfoort | NED |
| 2.34.68 | David Ugarkovich | 1947 | Sacramento M.H.W. (USA) | 04-08-98 | Amersfoort | NED |
| 2.36.31 | Ludwig Lorenz | 1948 | SG Gelsenkirchen (GER) | 13-06-98 | Apeldoorn | NED |
| 2.39.14 | Craig Coffin | 1948 | Team Orange County (USA) | 04-08-98 | Amersfoort | NED |
| 2.48.08 | John Alexander | 1947 | Empire (USA) | 04-08-98 | Amersfoort | NED |
| 2.49.73 | Hans de Vree | 1947 | Aqua Novio '94 | 13-06-98 | Apeldoorn | NED |
| 2.51.82 | Ferry Smit | 1947 | Aqua Novio '94 | 13-06-98 | Apeldoorn | NED |
| * 3.02.96 | Henk Wisselo | 1947 | AZC Masters | 12-06-98 | Apeldoorn | NED |
| 3.09.52 | Thomas van Rij | 1947 | Gay Swim Amsterdam | 04-08-98 | Amersfoort | NED |
| * 3.18.94 | Bernd Langer | 1947 | Hellas | 07-11-98 | Grunstadt | GER |
| * 3.36.88 | Bert Wille | 1945 | AZC Masters | 13-06-98 | Apeldoorn | NED |
| 3.39.74 | Henk Oostendorp | 1948 | West-Friesland | 26-04-98 | Amersfoort | NED |
| * 3.45.47 | Ed Dijkkamp | 1945 | AZC Masters | 13-06-98 | Apeldoorn | NED |
| * 4.07.10 | Arie van Woudenberg | 1947 | AZC Masters | 13-06-98 | Apeldoorn | NED |
400m freestyle 50-54 MEN 
|
| time | swimmer | birth |
club | date | city | country |
| 4.48.09 | Donald Uijtenbogaart | 1947 | De Dolfijn | 20-06-98 | Casablanca | MAR |
| 5.16.18 | Duke Dahlin | 1948 | USF Masters (???) | 05-08-98 | Amersfoort | NED |
| 5.25.77 | Paulo Figueiredo | 1946 | West Hollywood Aqul (USA) | 05-08-98 | Amersfoort | NED |
| 5.31.21 | Ludwig Lorenz | 1948 | SG Gelsenkirchen (GER) | 12-06-98 | Apeldoorn | NED |
| 5.32.66 | Richard Merritt | 1947 | Team NY Aquatic (USA) | 05-08-98 | Amersfoort | NED |
| 5.34.11 | Michael Jarvis | 1947 | Team Orange County (USA) | 05-08-98 | Amersfoort | NED |
| 5.40.53 | Craig Coffin | 1948 | Team Orange County (USA) | 05-08-98 | Amersfoort | NED |
| 5.58.55 | Randall Schiller | 1948 | USF Masters (???) | 05-08-98 | Amersfoort | NED |
| 6.13.77 | John Alexander | 1947 | Empire (USA) | 05-08-98 | Amersfoort | NED |
| 6.19.40 | Henk Wisselo | 1947 | AZC Masters | 12-06-98 | Apeldoorn | NED |
| 6.29.54 | Hans de Vree | 1947 | Aqua Novio '94 | 12-06-98 | Apeldoorn | NED |
| 6.42.03 | Thomas van Rij | 1947 | Gay Swim Amsterdam | 05-08-98 | Amersfoort | NED |
| 7.03.98 | Bernd Langer | 1947 | Hellas | 07-11-98 | Grunstadt | GER |
| * 7.44.29 | Bert Wille | 1945 | AZC Masters | 13-06-98 | Apeldoorn | NED |
| * 8.19.01 | Ed Dijkkamp | 1945 | AZC Masters | 13-06-98 | Apeldoorn | NED |
| * 8.25.44 | Arie van Woudenberg | 1947 | AZC Masters | 13-06-98 | Apeldoorn | NED |
800m freestyle 50-54 MEN 
|
| time | swimmer | birth |
club | date | city | country |
| 9.46.85 | Donald Uijtenbogaart | 1947 | De Dolfijn | 25-06-98 | Casablanca | MAR |
| 11.23.38 | Michael Jarvis | 1947 | Team Orange County (USA) | 08-08-98 | Amersfoort | NED |
| 11.26.44 | Ludwig Lorenz | 1948 | SG Gelsenkirchen (GER) | 13-06-98 | Apeldoorn | NED |
| 11.44.09 | Craig Coffin | 1948 | Team Orange County (USA) | 08-08-98 | Amersfoort | NED |
| 11.45.06 | Richard Merritt | 1947 | Team NY Aquatic (USA) | 08-08-98 | Amersfoort | NED |
| 12.30.84 | Randall Schiller | 1948 | USF Masters (???) | 08-08-98 | Amersfoort | NED |
| 13.07.10 | Maynard Kirkpatrick | 1948 | Kamloops (???) | 08-08-98 | Amersfoort | NED |
| *13.12.06 | Henk Wisselo | 1947 | AZC Masters | 24-04-98 | Gera | GER |
| 13.15.81 | Hans de Vree | 1947 | Aqua Novio '94 | 13-06-98 | Apeldoorn | NED |
| 13.21.69 | John Alexander | 1947 | Empire (USA) | 08-08-98 | Amersfoort | NED |
| 15.54.38 | Bert Wille | 1945 | AZC Masters | 13-06-98 | Apeldoorn | NED |
| 16.46.66 | Ed Dijkkamp | 1945 | AZC Masters | 13-06-98 | Apeldoorn | NED |
| 16.52.64 | Arie van Woudenberg | 1947 | AZC Masters | 13-06-98 | Apeldoorn | NED |
1500m freestyle 50-54 MEN 
|
| time | swimmer | birth |
club | date | city | country |
| 19.08.20 | Donald Uijtenbogaart | 1947 | De Dolfijn | 18-04-98 | Charleroi | BEL |
| 21.50.06 | Ludwig Lorenz | 1948 | SG Gelsenkirchen (GER) | 14-06-98 | Apeldoorn | NED |
| 24.58.44 | Henk Wisselo | 1947 | AZC Masters | 24-04-98 | Gera | GER |
| 25.43.19 | Horst Falke | 1946 | Wasserfreunde Wuppe (GER) | 14-06-98 | Apeldoorn | NED |
| 26.19.95 | Hans de Vree | 1947 | Aqua Novio '94 | 14-06-98 | Apeldoorn | NED |
| 32.40.02 | Arie van Woudenberg | 1947 | AZC Masters | 14-06-98 | Apeldoorn | NED |
50m backstroke 50-54 MEN 
|
| time | swimmer | birth |
club | date | city | country |
| .34.45 | Duke Dahlin | 1948 | USF Masters (???) | 02-08-98 | Amersfoort | NED |
| .35.86 | David Ugarkovich | 1947 | Sacramento M.H.W. (USA) | 02-08-98 | Amersfoort | NED |
| .36.96 | Henk Wisselo | 1947 | AZC Masters | 05-12-98 | Parijs | FRA |
| .37.81 | Donald Uijtenbogaart | 1947 | De Dolfijn | 05-12-98 | Parijs | FRA |
| .38.22 | Paulo Figueiredo | 1946 | West Hollywood Aqul (USA) | 02-08-98 | Amersfoort | NED |
| .40.34 | Berend Westera | 1945 | Team Auckland (NZL) | 02-08-98 | Amersfoort | NED |
| .40.40 | Ron Judd | 1945 | Team Auckland (NZL) | 02-08-98 | Amersfoort | NED |
| .40.70 | John Goodwin | 1948 | Empire (USA) | 02-08-98 | Amersfoort | NED |
| .41.19 | Joop van Eijk | 1947 | HHZV Plons | 02-08-98 | Amersfoort | NED |
| .41.32 | Ferry Smit | 1947 | Aqua Novio '94 | 13-06-98 | Apeldoorn | NED |
| .43.26 | Willem Beyleveld | 1947 | AZ&PC Anova | 26-04-98 | Amersfoort | NED |
| .50.00 | Bob van Schijndel | 1945 | Gay Swim Amsterdam | 02-08-98 | Amersfoort | NED |
| .57.92 | Jos Schoutsen | 1948 | Havana Swim Team | 02-08-98 | Amersfoort | NED |
100m backstroke 50-54 MEN 
|
| time | swimmer | birth |
club | date | city | country |
| 1.15.67 | Duke Dahlin | 1948 | USF Masters (???) | 05-08-98 | Amersfoort | NED |
| 1.16.17 | David Ugarkovich | 1947 | Sacramento M.H.W. (USA) | 04-08-98 | Amersfoort | NED |
| 1.22.93 | Donald Uijtenbogaart | 1947 | De Dolfijn | 06-12-98 | Parijs | FRA |
| 1.24.34 | Paulo Figueiredo | 1946 | West Hollywood Aqul (USA) | 05-08-98 | Amersfoort | NED |
| 1.28.59 | Berend Westera | 1945 | Team Auckland (NZL) | 05-08-98 | Amersfoort | NED |
| 1.29.78 | Henk Wisselo | 1947 | AZC Masters | 06-12-98 | Parijs | FRA |
| 1.31.13 | Hubert de Groot | 1946 | PPO Montreal (CAN) | 05-08-98 | Amersfoort | NED |
| 1.34.73 | Joop van Eijk | 1947 | HHZV Plons | 05-08-98 | Amersfoort | NED |
| 1.41.45 | Mike Greenberg | 1946 | San Diego (USA) | 05-08-98 | Amersfoort | NED |
| 1.49.04 | Neil Hart | 1944 | San Francisco (USA) | 05-08-98 | Amersfoort | NED |
200m backstroke 50-54 MEN 
|
| time | swimmer | birth |
club | date | city | country |
| 2.52.67 | Duke Dahlin | 1948 | USF Masters (???) | 07-08-98 | Amersfoort | NED |
| 3.03.34 | Donald Uijtenbogaart | 1947 | De Dolfijn | 18-10-98 | Breda | NED |
| 3.06.28 | Paulo Figueiredo | 1946 | West Hollywood Aqul (USA) | 07-08-98 | Amersfoort | NED |
| 3.17.43 | Maynard Kirkpatrick | 1948 | Kamloops (???) | 07-08-98 | Amersfoort | NED |
| 3.19.12 | Henk Wisselo | 1947 | AZC Masters | 25-04-98 | Gera | GER |
| 3.39.89 | Mike Greenberg | 1946 | San Diego (USA) | 07-08-98 | Amersfoort | NED |
| 4.03.19 | Neil Hart | 1944 | San Francisco (USA) | 07-08-98 | Amersfoort | NED |
| 4.12.78 | Kristian Nergaard | 1947 | San Francisco (USA) | 07-08-98 | Amersfoort | NED |
| 6.27.56 | Gerard Crete | 1947 | A Contre-Courant (CAN) | 07-08-98 | Amersfoort | NED |
50m breaststroke 50-54 MEN 
|
| time | swimmer | birth |
club | date | city | country |
| .37.42 | David Ugarkovich | 1947 | Sacramento M.H.W. (USA) | 04-08-98 | Amersfoort | NED |
| .38.04 | Michael MacManus | 1946 | M.U.E. (???) | 04-08-98 | Amersfoort | NED |
| .38.43 | Ferry Smit | 1947 | Aqua Novio '94 | 18-10-98 | Breda | NED |
| * .41.62 | Donald Uijtenbogaart | 1947 | De Dolfijn | 20-06-98 | Casablanca | MAR |
| .41.98 | Randall Schiller | 1948 | USF Masters (???) | 04-08-98 | Amersfoort | NED |
| .43.28 | Henk Wisselo | 1947 | AZC Masters | 06-12-98 | Parijs | FRA |
| .43.52 | Willem Beyleveld | 1947 | AZ&PC Anova | 26-04-98 | Amersfoort | NED |
| .43.72 | Thomas van Rij | 1947 | Gay Swim Amsterdam | 04-08-98 | Amersfoort | NED |
| .43.72 | Michael Jarvis | 1947 | Team Orange County (USA) | 04-08-98 | Amersfoort | NED |
| .43.97 | Guy Decker | 1946 | San Francisco (USA) | 04-08-98 | Amersfoort | NED |
| .45.10 | Bernd Langer | 1947 | Hellas | 07-11-98 | Grunstadt | GER |
| .49.24 | Gerard van Reijsen | 1948 | HHZV Plons | 04-08-98 | Amersfoort | NED |
| .52.57 | Martin Maaten | 1946 | Havana Swim Team | 04-08-98 | Amersfoort | NED |
100m breaststroke 50-54 MEN 
|
| time | swimmer | birth |
club | date | city | country |
| 1.22.35 | David Ugarkovich | 1947 | Sacramento M.H.W. (USA) | 07-08-98 | Amersfoort | NED |
| 1.25.51 | Donald Uijtenbogaart | 1947 | De Dolfijn | 05-12-98 | Parijs | FRA |
| 1.27.27 | Ferry Smit | 1947 | Aqua Novio '94 | 18-10-98 | Breda | NED |
| 1.36.33 | Thomas van Rij | 1947 | Gay Swim Amsterdam | 07-08-98 | Amersfoort | NED |
| 1.39.34 | Guy Decker | 1946 | San Francisco (USA) | 07-08-98 | Amersfoort | NED |
| 1.39.90 | Randall Schiller | 1948 | USF Masters (???) | 07-08-98 | Amersfoort | NED |
| 1.43.35 | Donald MacGregor | 1946 | Philadelphia F.A. (USA) | 07-08-98 | Amersfoort | NED |
| 1.44.10 | Johan de Munnik | 1948 | Gay Swim Amsterdam | 07-08-98 | Amersfoort | NED |
| 1.44.91 | Michael Webster | 1948 | Out to Swim (GBR) | 07-08-98 | Amersfoort | NED |
| 1.47.15 | Anton Lovink | 1947 | Ottawa (CAN) | 07-08-98 | Amersfoort | NED |
| * 1.48.66 | Henk Wisselo | 1947 | AZC Masters | 28-03-98 | Deauville | FRA |
| * 1.52.92 | Arie van Woudenberg | 1947 | AZC Masters | 13-06-98 | Apeldoorn | NED |
| * 1.53.25 | Ed Dijkkamp | 1945 | AZC Masters | 13-06-98 | Apeldoorn | NED |
| 2.00.14 | Gerard van Reijsen | 1948 | HHZV Plons | 07-08-98 | Amersfoort | NED |
| 2.00.65 | Bob van Schijndel | 1945 | Gay Swim Amsterdam | 07-08-98 | Amersfoort | NED |
| 2.02.95 | Henk Oostendorp | 1948 | West-Friesland | 26-04-98 | Amersfoort | NED |
200m breaststroke 50-54 MEN 
|
| time | swimmer | birth |
club | date | city | country |
| 3.00.26 | Donald Uijtenbogaart | 1947 | De Dolfijn | 20-06-98 | Casablanca | MAR |
| 3.01.69 | David Ugarkovich | 1947 | Sacramento M.H.W. (USA) | 03-08-98 | Amersfoort | NED |
| 3.19.19 | Ferry Smit | 1947 | Aqua Novio '94 | 13-06-98 | Apeldoorn | NED |
| 3.33.30 | Thomas van Rij | 1947 | Gay Swim Amsterdam | 03-08-98 | Amersfoort | NED |
| 3.33.84 | Willem van der Knaap | 1945 | WVH | 18-10-98 | Breda | NED |
| 3.34.82 | Guy Decker | 1946 | San Francisco (USA) | 03-08-98 | Amersfoort | NED |
| 3.37.75 | Richard Davis | 1948 | D.C.A.C. (USA) | 03-08-98 | Amersfoort | NED |
| 3.39.04 | Randall Schiller | 1948 | USF Masters (???) | 03-08-98 | Amersfoort | NED |
| 3.47.45 | Kristian Nergaard | 1947 | San Francisco (USA) | 03-08-98 | Amersfoort | NED |
| 3.49.29 | Henk Wisselo | 1947 | AZC Masters | 28-03-98 | Deauville | FRA |
| 3.50.34 | Johan de Munnik | 1948 | Gay Swim Amsterdam | 03-08-98 | Amersfoort | NED |
| 3.51.56 | Arie van Woudenberg | 1947 | AZC Masters | 13-06-98 | Apeldoorn | NED |
| 4.03.30 | Ed Dijkkamp | 1945 | AZC Masters | 13-06-98 | Apeldoorn | NED |
50m butterfly 50-54 MEN 
|
| time | swimmer | birth |
club | date | city | country |
| .30.71 | Peter Prijdekker | 1948 | Out to Swim (GBR) | 05-08-98 | Amersfoort | NED |
| .32.05 | Julius Young | 1946 | Modesto (???) | 05-08-98 | Amersfoort | NED |
| .32.42 | Michael Jarvis | 1947 | Team Orange County (USA) | 05-08-98 | Amersfoort | NED |
| .32.99 | Paulo Figueiredo | 1946 | West Hollywood Aqul (USA) | 05-08-98 | Amersfoort | NED |
| .33.18 | Richard Merritt | 1947 | Team NY Aquatic (USA) | 05-08-98 | Amersfoort | NED |
| .33.43 | Henk Wisselo | 1947 | AZC Masters | 18-04-98 | Charleroi | BEL |
| .34.39 | Donald Uijtenbogaart | 1947 | De Dolfijn | 05-12-98 | Parijs | FRA |
| .37.26 | John Goodwin | 1948 | Empire (USA) | 05-08-98 | Amersfoort | NED |
| .37.28 | Berend Westera | 1945 | Team Auckland (NZL) | 05-08-98 | Amersfoort | NED |
| .38.47 | Neal Wiener | 1944 | West Hollywood Aqul (USA) | 05-08-98 | Amersfoort | NED |
| .41.16 | Menno Messelink | 1948 | Amsterdam | 05-08-98 | Amersfoort | NED |
| .41.37 | Willem van der Knaap | 1945 | WVH | 18-10-98 | Breda | NED |
| .47.91 | Thomas van Rij | 1947 | Gay Swim Amsterdam | 05-08-98 | Amersfoort | NED |
100m butterfly 50-54 MEN 
|
| time | swimmer | birth |
club | date | city | country |
| 1.14.99 | Julius Young | 1946 | Modesto (???) | 03-08-98 | Amersfoort | NED |
| * 1.16.39 | Donald Uijtenbogaart | 1947 | De Dolfijn | 21-06-98 | Casablanca | MAR |
| 1.16.45 | Paulo Figueiredo | 1946 | West Hollywood Aqul (USA) | 03-08-98 | Amersfoort | NED |
| 1.17.81 | Michael Jarvis | 1947 | Team Orange County (USA) | 03-08-98 | Amersfoort | NED |
| 1.40.16 | Neal Wiener | 1944 | West Hollywood Aqul (USA) | 03-08-98 | Amersfoort | NED |
| 1.41.01 | Ralph Doore | 1947 | San Francisco (USA) | 03-08-98 | Amersfoort | NED |
| 1.43.00 | Henk Wisselo | 1947 | AZC Masters | 15-08-98 | Vasteras | SWE |
| 1.55.61 | Kristian Nergaard | 1947 | San Francisco (USA) | 03-08-98 | Amersfoort | NED |
200m butterfly 50-54 MEN 
|
| time | swimmer | birth |
club | date | city | country |
| 2.48.23 | Donald Uijtenbogaart | 1947 | De Dolfijn | 24-06-98 | Casablanca | MAR |
| 3.01.32 | Duke Dahlin | 1948 | USF Masters (???) | 06-08-98 | Amersfoort | NED |
| 3.02.74 | Julius Young | 1946 | Modesto (???) | 06-08-98 | Amersfoort | NED |
| 3.32.20 | Waynard Kirkpatrick | 1948 | Kamloops (???) | 06-08-98 | Amersfoort | NED |
| 3.42.46 | Henk Wisselo | 1947 | AZC Masters | 13-06-98 | Apeldoorn | NED |
| 3.51.22 | Nael Wiener | 1944 | West Hollywood Aqul (USA) | 06-08-98 | Amersfoort | NED |
| 4.04.39 | Richard Davis | 1948 | D.C.A.C. (USA) | 06-08-98 | Amersfoort | NED |
200m medley 50-54 MEN 
|
| time | swimmer | birth |
club | date | city | country |
| 2.40.39 | Peter Prijdekker | 1948 | Out to Swim (GBR) | 07-08-98 | Amersfoort | NED |
| 2.44.07 | Donald Uijtenbogaart | 1947 | De Dolfijn | 15-08-98 | Vasteras | SWE |
| 2.50.77 | Duke Dahlin | 1948 | USF Masters (???) | 07-08-98 | Amersfoort | NED |
| 2.56.36 | Paulo Figueiredo | 1946 | West Hollywood Aqul (USA) | 07-08-98 | Amersfoort | NED |
| 2.57.42 | Michael MacManus | 1946 | M.U.E. (???) | 07-08-98 | Amersfoort | NED |
| 2.57.85 | Michael Jarvis | 1947 | Team Orange County (USA) | 07-08-98 | Amersfoort | NED |
| 3.06.29 | Maynard Kirkpatrick | 1948 | Kamloops (???) | 07-08-98 | Amersfoort | NED |
| 3.06.72 | Richard Merritt | 1947 | Team NY Aquatic (USA) | 07-08-98 | Amersfoort | NED |
| 3.08.95 | Ferry Smit | 1947 | Aqua Novio '94 | 12-06-98 | Apeldoorn | NED |
| 3.20.10 | Henk Wisselo | 1947 | AZC Masters | 12-06-98 | Apeldoorn | NED |
| 3.43.81 | Willem van der Knaap | 1945 | WVH | 18-10-98 | Breda | NED |
400m medley 50-54 MEN 
|
| time | swimmer | birth |
club | date | city | country |
| 5.43.15 | Donald Uijtenbogaart | 1947 | De Dolfijn | 21-06-98 | Casablanca | MAR |
| 6.09.71 | David Ugarkovich | 1947 | Sacramento M.H.W. (USA) | 02-08-98 | Amersfoort | NED |
| 6.18.69 | Duke Dahlin | 1948 | USF Masters (???) | 02-08-98 | Amersfoort | NED |
| 6.21.46 | Paulo Figueiredo | 1946 | West Hollywood Aqul (USA) | 02-08-98 | Amersfoort | NED |
| 6.34.18 | Michael MacManus | 1946 | M.U.E. (???) | 02-08-98 | Amersfoort | NED |
| 6.51.66 | Maynard Kirkpatrick | 1948 | Kamloops (???) | 02-08-98 | Amersfoort | NED |
| 7.26.34 | Henk Wisselo | 1947 | AZC Masters | 18-04-98 | Charleroi | BEL |
| 7.29.85 | Berend Westera | 1945 | Team Auckland (NZL) | 02-08-98 | Amersfoort | NED |
| 8.21.45 | Kristian Nergaard | 1947 | San Francisco (USA) | 02-08-98 | Amersfoort | NED |