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Source:
Colnect
Issued by:
Canada
Function:
postage
Date:
6/17
/
1988
Denom:
37(c)
Color:
multicolored
Design type:
inventions (1988)
Design:
electron microscope
1938
Watermark:
unwmk
Perf:
12.5x13.25
Sort pos:
3
Catalog value:
Prev:
37(c) d=Marquis Wheat 1909
Next:
37(c) d=Cobalt Therapy 1951
External links:
Colnect 274713..ogy_3rd_series
