Old Mainspring / New Mainspring

WestCoastTime
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Hamilton 917 mainsprings, old & new.

PXL_20210803_033907386.jpg


Old is probably around 80 years old. New is from Bestfit (& missing one half of the T-end :-p ).
 
Archer
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It's also not laying flat, so I would try to correct that before you use it.
 
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