Auction 90, Session 2 - Worldwide Rare Stamps and Postal History

Switzerland - Air Post stamps

The auction will start in __ days and __ hours

Start price: $350

Buyer's premium:

1919-20, carmine Propeller overprint on 30(c) yellow brown and pale green and 50(c) dark and pale green, blocks of four, the last one with right sheet margin, full OG, NH, VF, J.-C. Marchand certificate, C.v. $1,400++, SBK #F1-2, CHF2,720 as singles, Est. $500-$600, Sc. #C1-2