Westclox Factory ALARM Mainspring for Big Ben Chime Alarm Clock Model No. 69

Westclox Factory ALARM Mainspring for Big Ben Chime Alarm - Model No. 69 (69, 69B, 69C, 69D) Clocks from the 1930's and 1940's (and perhaps beyond), Factory No. SPR-3250, new in dusty and/or torn & frail envelope. Could also very well fit in other alarm and travel clocks as well. Mainspring needs a very good and thorough cleaning before use. I likely have several of these so the one you get may differ slightly from the images. I sell a reprint of the factory parts and assembly catalog for this model of Alarm Clock if you need it, just check my other listings. I specialize is hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a suitable job of representing the item.