USSR Russia 1937 Airmail Airplane 10 kop. RARE IMPERFORATE stamp with two certificates of authenticity MNH
Date of issue: 15 Nov., 1937
A very rare stamp in excellent (flawless) collectible condition.
Attached is a certificate of authenticity from the Public Foundation "Stamps of St. Petersburg" (2015, Russia) and an expert certificate from Ludger Hovest (2014, Germany)
St # SU37/Avia imperf
