Sandsteel Mainspring for Jaeger 8-Day Travel Clock #34640 - Steel

Sandsteel Mainspring for Jaeger 8-Day Travel Clocks from the 1930's and 1940's (and perhaps beyond), Dennison 34 x 3/0 x 42, No. 34640, Tongue-end, steel, new in envelope. Could also very well fit in other travel & alarm clocks as well. See images for precise mainspring specifications. I likely have several of these so the one you get may differ very slightly from the images. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a suitable job of representing the item.