Longines balance staff 17L original 17.69ZE 37.9ABC

1 Longines balance staff / 1 axe de balancier Longines

Neuf de stock / New old stock

Axe identique pour les 3 calibres Longines suivants / Same balance staff, for the 3 following calibers :

17L 17.69ZE  37.9ABC  - Not for 37.9 nor 37.9M nor 37.9N , nor 37.93 , nor 17.69M , nor 17.69NZ

Original Longines part