1920's VERY SCARCE Friend of Steinmetz Pin ~ Genius in Mathematics & Electronics

Description

This original tin litho pin measures approx. 13/16" and has its Green Duck Co. mfg info printed on its reverse side.  Charles Proteus Steinmetz (1865-1923), the "Wizard of Schenectady" was a German-born American genius mathematician and electrical engineer.  He won wide acclaim & recognition in the scientific community for his many pioneering achievements in the electrical engineering field.  Nice scarce item.  Thanks for looking at this auction.