These stamps from the Netherlands include computer designed diagrams.


Stamp Description
Netherlands, 12c + 8c, 1970
Scott: B457 SP192
Isometric projection from circle to square
Netherlands, 15c + 10c, 1970
Scott: B458 SP192
Parallel Planes in a cube
Netherlands, 20c+10c, 1970
Scott: B459 SP192
Two overlapping scales
Netherlands, 25c + 10c, 1970
Scott: B460 SP192
Transition phases of concentric circles
with increasing diameters
Netherlands, 45c + 20c, 1970
Scott: B461 SP192
Four spirals