Vintage telegraph set, Signal Corps J-38 Key & Electric Manufacturing Company Of Menominee, Michigan 4 Ohm telegraph sounder. A well-worn telegraph set with a knob fitted to the key as a repair. Auction Item 281A -- Cledis Estes Auctions II of Medina, Ohio. Photo by Joe Haupt uploaded on Flickr under a free CC-BY-SA license.

Flickr file: www.flickr.com/photos/51764518@N02/37214343242