Postage stamps: industry and technology - Germany / Federal Republic of Germany 1975 - 100 Pfennig

A new postage stamp continuous series with representations from industry and technology replaces the postage stamp continuous series "Federal President Heinemann". The postage stamps of 40 Pfennig, 50 Pfennig and 100 Pfennig appear as the first values ​​of this series with the inscriptions Deutsche Bundespost: 100 Pf: brown coal excavator It is part of a bucket wheel excavator with a daily working capacity of 100,000 solid cubic meters, as used in the 2,500 square kilometer Rhenish lignite mining area in the city triangle Cologne - Aachen - Dusseldorf for the promotion of primary energy brown coal. These bucket wheel excavators - 7,600 t, 200 m in length and 70 m in height - are the largest earth conveyors, each of which is capable of handling the work of 20,000 people in a single day. Or in other words: If you were to layer the space material on a soccer field moved by a device in a single day, this would result in a 10 m high hill. The operating crew consists of 5 persons.