細節
Proof EXPRESS LETTER STAMP: 1962 20c., four die proofs in shades of magenta (one with pencil ammendment), each on gummed paper (70x57mm.), two stamp-size proofs on individual presentation cards, both marked "Approved", one dated "8-3-61" with ink lines crossing the proof, the other dated "10/8/61" -- both cards creased clear of proof.