Stamps of Germany - Berlin, 15 Oct 1975
1 to 3 of 3
postage
1975, May 15 1975 issue - technology (1975) unwmk p. 14
| X | 80pf | grn | tractor | |||
| X | 120 | vio | Chemical plant for the production of styrene | |||
| X | 160pf | grn | Large blast furnace with wind heater system |
1 to 3 of 3