1 Rbl. on 20 Kopeks postal stationery card, the value stamp has a genuine overprint, tied with a postmark that was not authorized for postal use due to the Soviet state emblems and the designation CCCP. For postal stationery cards Michel number P3, this is a particularly rare card! Signed E Keiler and photo certificate Walter Zirath BPP (2008): "...The condition is flawless.", Michel 1500.-