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Dr. C. Best and Sir F. Banting
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Dr. C. Natesan
Dr. C. L. Valverde
Short desc: Dr. C. L. Valverde
This design is used by 2 stamps:
(See all uses as list)
7/20/1950 80c gray&blk
7/20/1950 1col org&blk
All are Costa Rica airmail issue=War for National Liberation 2nd
