Bidspirit auction | Worldwide Air Post Stamps and

Worldwide Air Post Stamps and Postal History - Latvia - GROUP OF 12 AIR POST ISSUES: 1921-33, Bleriot XI first and second sets, Semi-Postal Air Post sets - Eagle, Aviation Pioneers and two imperforated sets of Biplane with upright and sideways watermark, full OG (three stamps with toned gum), NH, VF, C.v. $925, Est. $250-$300, Sc. #C1-8, CB3‑13, a, CB18a- 20a