Thanks! Still, can't quite put it all together. The car 'on the right' looks like it could be a monocoque Lotus 25 of Jim Clark (the only monocoque car raced in Zandvoort in 1962) - dark wheels, V8 Climax with both intake and exhaust on top.
The one 'on the left' could be Trevor Taylor's tube-framed Lotus 24 with a (different) V8 Climax, but on the pictures from the race I can see it had a similar intake-exhaust layout, unlike the car pictured here, as well as dark front wheels, while the pictured car has light ones. What is more, the nose cover that lays behind the (possible) Clark's car feature the number with a pretty clear '..1' or '1...' that doesn't fit to any of the works Lotuses raced with 4 and 5.
Also, some sources state that Clark and Taylor practiced and raced in different cars, maybe that's the thing.
