POZNAŃ. Envelope with two postage stamps of 25 and 100 marks, issued on the occasion of the establishment of the Aero-Targ airline in Poznań on May 10, 1921, which served visitors to the First Poznań Fair

POZNAŃ. Envelope with two postage stamps of 25 and 100 marks, issued on the occasion of the establishment of the Aero-Targ airline in Poznań on May 10, 1921, which served visitors to the First Poznań Fair, on one stamp a view of an angel and airplanes, on the other an airplane dropping letters, on both stamps an inscription at the bottom: AERO-TARG-POZNAŃ 1921, also stamps with date: 15.6.21. st. bdb; stamps dimensions:60x40mm, envelope dimensions:145x100 mm.