Internet Horology Club 185
non magnetic watch co of America mainspring

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July 07, 2024, 09:37
Larry Helms
non magnetic watch co of America mainspring
Was wondering if anyone knows what the type and number is for a grade 94 15 jewel non magnetic watch co of America mainspring and where to find one?

Thank you,
Larry
July 08, 2024, 11:58
Douglas D. Weaver
Larry

I suggest that you remove the mainspring from the barrel, then measure it - length, width, and strength. Also note the type of ends.

If you PM me, I'll send you a chart with mainsprings listed with all the dimensions.

As for where to find them, I frequently buy on eBay, but there are other sources such as Ofrei, Esslinger, Cas-Ker, watchpartsrus, etc. I prefer new white allow mainsprings to the old stock blue springs.


Good luck

Doug
July 09, 2024, 04:10
Larry Helms
Thank you Doug.

Larry