U.S. and Worldwide; Zemstvo
November 6-7, 2013 and November 13, 2013
| Images | Description | Current Bid |
 | Lot #1235 POLAND Flight Covers 1931 (20.7) first flight from Sofia (Bulgaria) to Gdynia, v.f., with 21.7. Warszawa transit and 22.7.31 Danzig arrival pmks, returned to sender, v.f., only five (!) carried  | Price Realized $1,400.00 |
