Centenary of Mendeleev's Periodic Table of Elements
30 k 1969
USSR
1.7 - 2$
price on 24.02.2023
Sheet size also exists as 75 x 110 mm.
| Country: | USSR |
| Type: | Postal blocks |
| Series: | Centenary of Mendeleev's Periodic Table of Elements |
| Nominal: | 30 k |
| Year: | 1969 |
| Material: | Chalk surfaced |
| Size: | 76 x 104 mm |
| Perforation: | frame 12 x 12¼ |
| Mintage: | 750,000 |