TCoCD: Gustav Robert Kirchhoff

(click for larger image, 45k)	Federal Republic of Germany, Berlin (15.02.1974) 30 Pf 33 * 27.5 mm Michel 465 The stamp was issued on Kirchhoff's 150. birthday and shows Kirchhoff's circuit laws.
(click for larger image, 72k)
(click for larger image, 57k)	German Democratic Republic (26.03.1974) 5 Pf 27.5 * 33 mm Michel 1941 The stamp was issued on Kirchhoff's 150. birthday and is part of the five piece set Important Personages.