Sandsteel Mainspring for Waltham 12s Colonial A. No. 2234 - Steel

Sandsteel Mainspring for Waltham 12s Colonial A Movements, Factory No. 2234, steel, new in envelope. See image for specifications and further details. The Colonial A series ranged in size from just over 10s to just about 14s (you'll see them shown this way in some materials) but the lazy manufacturers just either didn't put the size or they called them 12s. I specialize is hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.