SALMANPK
14011
DeBethune
twin flanking steel springs that supplement the Incabloc spring over the balance staff. Not only does this patented arrangement better guard against damage, but it also accelerates the recentering of the balance staff pivots in their jewels to more rapidly restore precise timekeeping.
DeBethune
twin flanking steel springs that supplement the Incabloc spring over the balance staff. Not only does this patented arrangement better guard against damage, but it also accelerates the recentering of the balance staff pivots in their jewels to more rapidl...
