Switzerland
1913, 50c Flugpost Laufen semi-official airmail
Type IV, unmounted mint, fresh, issued on occasion of the airmail flight from Laufen to Solothurn on 28 September, 1913, very fine; handstamped Vugniaux and accompanied by his certificate. (SBK VII)
Switzerland Zumstein SBK VII **
$ 348.50
Switzerland
1913, 50c Flugpost Laufen semi-official airmail
Type IV, unmounted mint, fresh, issued on occasion of the airmail flight from Laufen to Solothurn on 28 September, 1913, very fine; handstamped Vugniaux and accompanied by his certificate. (SBK VII)