Stamps from Western Europe and Scandinavia: Sweden - Airpost Semi-Officials
Catalogue numbers are as per Scott’s unless otherwise noted. Other catalogues used: Ceres; “Fi” = Fischer; “Mi” = Michel; “Sass” = Sassone; “SG” = Stanley Gibbons and “YT” = Yvert & Tellier.
1912 60o violet, tied by special violet "Sveriges Forsta Flygpost, September 1912" pmk to large piece, flown on demonstration flights from Tireberg to Vartan and Lindingo, with additional 10o horizontalpair alongside
|Cat. #Facit HF1||$110.00|
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