LangeHeng
69
Resonance movement?
Since 1999 till now,is there any improvement of upgrading on the movement?
Thanks..................

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There has...
By: bs22fly : March 8th, 2009-17:13
Very good question. I will need to do some homework to list all of them. One change is that the ratchet wheels are now under the bridge. You can see that in the photo below between a ruthenium coated brass movement and the more recent gold....