Stamps of Netherlands, 2c+3c denom
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semipostal
1955, Apr 25 social & cultural 1955 issue - buildings (1955) unwmk (no perf info)
| - | 2c+3c | olbrn | Factory building of Van Nelle Rotterdam |
1955, Aug 15 cancer research issue p. 12.5x12
| - | 2c+3c | grayblk & red | microscope & pierced crab |
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