Progress in technology and science

Under the name of progress in technology and science that gave German Federal Post a stamp series from 8 different motives in 1964 to 1968th This series was only available as a sheet of stamps .

List of issues and motives

All motifs were designed by Karl Oskar Blase .

image	description	Values in pennies	Issue date	Valid for postage until	Wed no.
	100 years of the benzene formula Friedrich August Kekulé von Stradonitz	10	August 14, 1964	December 31, 1966	440
	25 years of nuclear fission , nuclear reactor in operating condition Otto Hahn , Fritz Straßmann	15th	August 14, 1964	December 31, 1966	441
	100 years of the German internal combustion engine Gas engine from Nikolaus Otto , Eugen Langen	20th	August 14, 1964	December 31, 1966	442
	75 years of three-phase transmission	20th	September 28, 1966	December 31, 1968	521
	100 years of the electrodynamic principle Dynamo from Werner von Siemens	30th	September 28, 1966	December 31, 1968	522
	150 years of printing machines Friedrich Koenig's first high-speed letterpress cylinder press	10	20th January 1968	December 31, 1970	546
	1000 years of mining in the Harz Mountains Erzkristalle: Top galena , down sphalerite	20th	20th January 1968	December 31, 1970	547
	100 years of scientific microscope construction Beam guidance through a modern microscope Ernst Abbe , Carl Zeiss	30th	20th January 1968	December 31, 1970	548

literature

• Michel catalog Germany 1999/2000 (paperback), publisher: Schwaneberger Verlag GmbH (1999), ISBN 3-87858-028-2

Web links

Commons : Advances in technology and science  - collection of images, videos and audio files