1. Henke Coll 1_23 Reference (shelfmark): Henke Coll 1_23 Title: United States of America Centenary of the American Steel Industry Issue 3c stamp Scope & Content: Marginal block of four perforated MNH stamps. This issue was designed by A. Petruccelli. Engraved by R. Bower and J. Edmondson. Collection Area: Philatelic Collections Languages: English Date Range: 22 May 1957 Extent: 4 Items