ETA mainspring 730 731 732 / Felsa 4020 4021 4122 / Bulova 4AB 7AB 7AE 7AR

1 mainspring / Ressort de barillet / Zugfeder (1 piece)

New old stock / neuf de stock

Same mainspring for following calibers :

ETA 730 731 732  / Felsa 4020 4021 4022 4025 4122 4125

and also Bulova 4AB 7AB 7AE 7AR  / Benrus B

Le prix est pour 1 ressort / The price is for 1 mainspring

Livraison sous film neutre / Shipping in neutral zip bag (the last one will be shipped with the original Usibel envelope)