Full set of IMPERF PLATE PROOFS. Ex - Perkins, Bacon & Co Ld. The item "PANAMA 1934 NATIONAL INSTITUTE Sc 268-273 FULL SET OF IMPERF PROOFS UNUSED F, VF" is in sale since Friday, December 21, 2018.This item is in the category "Stamps\Latin America\Panama". The seller is "victorgg" and is located in Buenos Aires. This item can be shipped worldwide.