Worldwide Air Post stamps and postal history, Zeppelin Flight items, philatelic rarities of the World. Part 3

Imperial Russia

The auction will start in __ days and __ hours

Start price: $150

Buyer's premium:

1857, 10k brown and blue, imperforated single with numeral watermark ”1”, pen cancellation expertly removed, clear margins at all sides, appears as an unused example, Est. $200-$300 , Sc. #1