Zenith balance staff 10"'1/2 N (ht. 337)

1 Zenith balance staff / 1 axe de balancier Zenith

Neuf de stock / New old stock

For the rare caliber size 10"'1/2 model N

Height 337 / half height 163 / balance arbor 75 / hairspring collet 45 / roller 43

(not for the model 10"'1/2 NS I with height 332 and half-height 159)
Livraison sous film neutre / Shipping in neutral zip bag