50 years of Soviet inventions

Owner	Jose Roberto Lara
Observations	Catalog code:Mi:SU 3637, Sn:SU 3610, Yt:SU 3500
Country	Russia
Face value	4 Kopek Ru
Measures	28 x 40 milímetros
Year	1969
State	Used
Status	Exhibition - Non-transferable
Category	Commemorations
Format	Vertical
Color	Multicolor
Other information	Perforated stamp
visualizations	179