Estonia 1920 5m yellow, black and light green, variety...

Estonia 1920 5m yellow, black and light green, variety “Damaged Plane” (position 50), used with additional franking on registered cover from Tallinn, via Helsinki to Lund, Finland, with arrival pmk on back. A fine and scarce usage of this printing flaw on cover

(via Philasearch.com - Estonia Airmail stamps, Scott C1var)

http://ift.tt/2CcnSvi