1. Henke Coll 1_13 Reference (shelfmark): Henke Coll 1_13 Title: United States of America Liberty Definitive Issue 1 1/2c stamp Scope & Content: Marginal block of four perforated MNH stamps depicting Mount Vernon. The stamp was designed by W. Schrage. Engraved by C. Brooks and J. Edmondson. Collection Area: Philatelic Collections Languages: English Date Range: 22 Feb 1956 Extent: 4 Items