cover 1913, 50c Herisau Air Post semi-official (Michel V), used with 5c Green (148) on special flight card used locally, both stamps tied by purple circular flight cachets, reverse is a multi-color illustration of the plane in flight, fresh, tiny scuff in the address has been touched-up (does not detract), otherwise very fine, Michel DM 1,500.00 (used stamp DM 1,200.00) photo
cover 1913, 50c Herisau Air Post semi-official (Michel V), used with 5c Green (148) on special flight card used locally, both stamps tied by purple circular flight cachets, reverse is a multi-color illustration of the plane in flight, fresh, tiny scuff in the address has been touched-up (does not detract), otherwise very fine, Michel DM 1,500.00 (used stamp DM 1,200.00) photo

Details
cover 1913, 50c Herisau Air Post semi-official (Michel V), used with 5c Green (148) on special flight card used locally, both stamps tied by purple circular flight cachets, reverse is a multi-color illustration of the plane in flight, fresh, tiny scuff in the address has been touched-up (does not detract), otherwise very fine, Michel DM 1,500.00 (used stamp DM 1,200.00) photo