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Auction: 16USA - The Frederick R Mayer Collection of Costa Rica
Lot: 121

#7-15, 1881-1882 U.P.U. accumulation of hundreds of items, including several blocks of various sizes which will be quite useful for plating, also many examples of counterfeit surcharges including an annotated section of the Ross counterfeits, mixed quality but should prove to be quite a worthwhile reference accumulation. Estimate US$ 750-900

Sold for
$40,000