1968 Sc 3593. 2750th Anniversary of Yerevan. Scott 3525

1968. 2750th Anniversary of Yerevan.
Catalog numbers: Scott 3525, Standard Collection 3593, Michel 3544, Yvert 3413.
Issued on: October 10, 1968.
Perforation: comb 11½.
Printing: Photogravure and Recess.
Size: 28 x 40 mm.
Colors: Dark brown.
Face value: 12 Russian kopek.
Quantity: 4,000,000.