Internet Horology Club 185
Mainspring conversion formula, Dennison Vs. Metric

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https://ihc185.infopop.cc/eve/forums/a/tpc/f/3426047761/m/9161071903

April 23, 2008, 18:25
Enzo Liguori
Mainspring conversion formula, Dennison Vs. Metric
Hi,

books normally show Dennison sizes while in shops only modern metric sizes are available , here are conversion formulas to convert D -) M

rgds

http://germanwatch.proboards43.com/index.cgi?action=dis...al&thread=838&page=1