SA 3 – plain (PTT?) – Davos!
SA 75th anniversary in Switzerland, various anniversaries
Issued 05.03.1958
Postmark: Davos!!
Cachet: Plain (PTT?)
Stamps: Stanley Gibbons 587 – 590 (SA stamps is no. 590)
Remark: RARE with DAVOS PM
SA 3 – Switzerland – PTT – Davos!