Grand Prix de Limbourg

Car number 37, "Helde," Porsche 904 GTS and car number 36, Rob Slotemaker, Porsche 904 GTS.

Grand Prix de Limbourg

Car number 36, Rob Slotemaker, Porsche 904 GTS.

Grand Prix de Spa 500 km

Car number 42, Rob Slotemaker driving Racing Team Holland Porsche 904 GTS.

Mosport Player's 200

#10 Porsche Carrera 904 GTS, driver Rob Slotemaker, #97 Cooper Monaco-Chevrolet, driver Charlie Hayes, #81 Kelly-Porsche, driver Wayne Kelly, #58 Porsche Carrera 904 GTS, driver Jacques Duval, #169 Lotus 23-Climax, driver Nat Adams

Paris 1000 km

Car number 34, driven by Rob Slotemaker and David van Lennep, is the Racing Team Holland-entered Porsche 904GTS.

Paris 1000 km

Porsche 904 GTS chassis 023, number 34, of Rob Slotemaker and David van Lennep.

Paris 1000 km

The Porsche 904 GTS chassis 023, number 34, of Rob Slotemaker and David van Lennep, chasing down the Lotus Elan, number 36, of Rene Richard and Pierre Gele.

Paris 1000 km

The Abarth-Simca 1300 Bialbero, number 53, of Jean-Pierre Hanrioud and Claude Ballot-Lena, leading the Porsche 904 GTS chassis 055, number 33, of Ben Pon and Gerhard Koch. The Porsche 904 GTS chassis 023, number 34, of Rob Slotemaker and David van Lennep, follows close behind.

Snetterton 3 Hour

The Porsche 904 GTS chassis 023, number 20, of Rob Slotemaker.

Spa 24 Hours

Spa Grand Prix 500 km

Track action scene, right to left: Car Number 42, a Porsche 904 GTS, (Rob Slotemaker, driver), Car Number 31, a Ferrari 250 GTO, (Gérald Langlois van Ophem, driver).