Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 1

Thursday, May 4, 2023 at 3:00 PM UTC

United States - Modern Errors and Varieties

Start price: $250

Buyer's premium:

1991, Kestrel 1c and Bluebird 3c, imperforate proofs in horizontal se-tenant strip of four with gutter in the middle, light fold along the gutter, still full OG, NH, VF and rare, se-tenant gutters of such proofs are listed, but priced with”-”, Est. $500-$600, Scott #2476-78 P