1882 3s orange and yellow, background inverted, the unique block of four, never hinged, re-joined (in places) vertically and horizontally, each stamp with a handstamped guarantee mark, also pencil signed at lower left, with 1960 R.V. Karaivanoff and 2002 Alex Rendon certificates. A showpiece of Bulgarian and International philately (YT 14a, catalogue value for hinged singles) -
Estimate price: $14000-15000
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Cherrystone Auctions, Inc.
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