Libya 1976 Chess Olympiad proofs on a page from the Courvoisier archive, 6-stage imperf. progressive proofs of the 15d, 30d and 100d, plus a perf. proof of the final design, ex Courvoisier Archive (21) Dealer David Feldman S. A. Geneva Auction Minimum Bid: 320.00 EUR (via Philasearch.com: David Feldman Specialised auction: Airmails & Middle East - item 9346-A177-21331)
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