Worldwide Air Post Stamps and Postal History, Philatelic Rarities of the World, Part 2

Imperial Russia - For Mailman (V Pol'zy Pochtaliona)

The auction will start in __ days and __ hours

Start price: $4,000

Buyer's premium:

1909, red overprint on revenue stamp of 15k blue and rose, block of four, top stamps without overprint, while bottom ones bearing double overprint (one inverted) due to amazing overprint shift, full OG, NH (bottom stamps) or LH, VF and extremely rare, according to our records the only block of four and the vertical pair of this error are known, Raritan Stamps guarantee, Standard Cat. #J1 var, Est. $8,000-$10,000