U.S. and Worldwide Stamps and Postal History

1921 5,000k dark green and pale blue, Madonna and Child, center inverted, very well centered and fresh, lightly hinged, very fine, with 2004 Philatelic Foundation Certificate. One of the premier Inverted Centers of 20th century Europe; less than 100 examples reported (used and unused), with at least 38 of these tied up in museums, many others with quality problems, leaving very few opportunities for a collector to obtain one of these beautiful rarities,
Cat. Val. $16,000
Estimate: $15000