Medals, non-regal, Sweden. Alfred Nobel (1833–1896). 50th Anniversary of the Invention of "Extra Dynamite" Uniface Bronze Plaque, 1929. Dimensions: 41×59 mm. By Sporrong & Co. Obverse: Bust of Nobel left; in four lines below: NOBELS / EXTRADYNAMIT / 1879–1929 / NITROGLYCERIN - A.B. 01.
