Erwin Sattler Mechanica M1 Upgrade Kit: CUTAWAY IN THE NORMAL OR REGULATOR DIAL
The upgrade kit “cutaway in the regulator dial” can only be ordered in combination with the upgrade kit “regulator dial”. The cutaway in the seconds subdial in conjunction with a milling in the top plate of the movement makes it possible to see the gold-plated gear wheels and the Graham escapement. The modified set contains the dial with cutaway as well as the top plate with its special milling.
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