1945 Hospital of St. John, complete set of imperf. trial color proofs in blocks of four, without gum, v.f.
Estimate: $150
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Lot #309 - COSTA RICA Air Post
Lot #490 - COSTA RICA Air Post
1934 unissued value 35c violet, also 5c ultramarine and 10c green, plus 1col, 2col and 5col black, six different large die proofs, card mounted, some toning, mostly fine-v.f.
Estimate: $250
Lot #491 - COSTA RICA Air Post
1934 Issue, 5c-5col, twelve diff. large die proofs, reduced to stamp size and card mounted, some minor toning, mostly fine-v.f.
Estimate: $250
Lot #492 - COSTA RICA Air Post
1940 "Panamericano" overprint omitted, 10c, 35c, 75c and 1.35col, four diff. large die proofs, some mounting toning on back, fine-v.f.
Estimate: $250
Lot #493 - COSTA RICA Air Post
1944 Issue, eight different large die proofs, card mounted, some adhesive toning on back, mostly fine-v.f.
Estimate: $500
Lot #494 - COSTA RICA Air Post
1947 Roosevelt, 30c-5col, six different large die proofs, some mounting toning on back, fine-v.f.
Estimate: $250