Germany
0.02 - 0.02$
price on 05.08.2022
Centenary of publication of August Kekulé's Benzene Formula
| Country: | Germany |
| Type: | Postage stamps |
| Series: | Scientific Anniversaries (1st series) |
| Nominal: | 10 Pf. |
| Year: | 1964 |
| Material: | fluorescent |
| Size: | 28 x 33 mm |
| Perforation: | comb 13¾ x 14 |
| Mintage: | 70,000,000 |
Scientific Anniversaries (1st series)
 Diagram of Benzene Formula 0.02$ |  Diagram of Nuclear Reaction 0.02$ |  Gas Engine 0.11$ |