25 + 10 Cent 1967
20 + 10 Cent 1967
15 + 10 Cent 1967
12 + 8 Cent 1967
75 Cent 1967 - Amphilex '67
25 Cent 1967 - Amphilex '67
20 Cent 1967 - Amphilex '67
45 Cent 1967
20 Cent 1967
45 + 20 Cent 1967 - Red Cross
20 + 10 Cent 1967 - Red Cross
15 + 10 Cent 1967 - Red Cross
12 + 8 Cent 1967 - Red Cross
25 + 10 Cent 1967 - Red Cross
45 + 20 Cent 1967 - Crab
25 + 10 Cent 1967 - Jellyfish
20 + 10 Cent 1967 - Blue Mussel
15 + 10 Cent 1967 - Common Whelk
12 + 8 Cent 1967 - Beach Finds
20 Cent 1967 - Delft University of Technology
40 + 20 Cent 1966
25 + 10 Cent 1966
20 + 10 Cent 1966
12 + 8 Cent 1966
10 + 5 Cent 1966
40 Cent 1966
20 Cent 1966
40 + 20 Cent 1966 - Society of Dutch Literature
25 + 10 Cent 1966 - Society of Dutch Literature
20 + 10 Cent 1966 - Society of Dutch Literature
