Zenith balance staff 10"'1/2 NS I (ht. 332) / Ronda 2601

1 Zenith balance staff / 1 axe de balancier Zenith

Neuf de stock / New old stock

Size 10"'1/2 , for both calibers NS I and 6NP

Ronda code 2601

height 332 / half height 159 / balance arbor 75 / hairspring collet 45 / roller 43

(not for the rare model 10"'1/2 N with height 337 and half-height 163)
Livraison sous film neutre / Shipping in neutral zip bag