1951 Sc 1540I-1555I 1955 Second printing. Famous Russian scientists Scott 1568-1583
1955. Second printing. Famous Russian scientists. Stamps of first and second issues have different size (usually 1 mm difference by height). For example, height of the first stamp of the set: first printing – 33m, second – 32mm. Feel free to ask us, if you don’t have a specialized catalog.
Catalog numbers: Scott 1568-1583, Standard Collection 1540I-1555I, Michel 1575-1590.
Issued on: 1955-1956.
Perforation: line 12½.