Internet Horology Club 185
Illinois Sangamo 23 jewel model 9 mainspring

This topic can be found at:
https://ihc185.infopop.cc/eve/forums/a/tpc/f/3426047761/m/9223989287

July 19, 2014, 17:41
Ernest C. Barnes
Illinois Sangamo 23 jewel model 9 mainspring
Need a mainspring for a model 9. Looks like it has a .744 tooth diameter. Prefer a white alloy. I have numbers JA410 and SA414, which one should I use or neither one?
July 19, 2014, 18:34
Gary E. Cochran
Ernie according to the Swigart book the JA410 (47315) should be the right one for the small barrel 744" tooth diameter...If you need one I have one $13.00 with shipping included...