1938, 30¢ Presidential, deep blue shade, top left corner margin plate "22164" block of 4, o.g., never hinged, very well centered and margined throughout, bright post office freshness, Extremely Fine and choice; with 2004 P.S.E. certificate. Scott No. 830b  $1,200. AN EXCEPTIONAL PLATE BLOCK OF THE 30¢ PREXIE IN THE RARE DEEP BLUE SHADE. $0 (Image)