Waltham Factory Mainspring for 10s - 14s Colonial A No. 2234 - Steel

Waltham Factory Mainspring for 10s -14s Colonial A Movements, Factory No. 2234, steel, new in envelope. See image for further details - but be mindful please that while the Colonial series watches use #2234 the characteristics can often differ slightly, as can the envelopes they come in - some of this because there were several flavors of the Colonial A that seem to have ranged in size from just over 10s to just about 14s (you'll see them shown this way in some materials) but some lazy manufacturers just either didn't put the size or they called them 12s. I specialize in hard to find watch parts so I usually have whatever you might need and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.