Lot
284 
1992, 29¢ Alaska Highway, black (engraved) omitted, plate block of 4 with plate number "11111", o.g., never hinged, Very Fine, a very rare plate block; with 2023 P.S.E. certificate.Scott No. 2635a $2,300 for singles.
Sale 121: Gems of Philately
1954-2012 Modern Errors
Lot 284
1992, 29¢ Alaska Highway, black (engraved) omitted, plate block of 4 with plate number "11111", o.g., never hinged, Very Fine, a very rare plate block; with 2023 P.S.E. certificate.Scott No. 2635a $2,300 for singles.