Unitas mainspring 408 402 396 395 390 389 388 387 380 / Angelus 105 / Record 45 46

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

New old stock / neuf de stock

Same mainspring for following calibers : Unitas 408 402 396 395 390 389 388 387 380 364 363 359 358 78 77 72 71 66 65 60 59 56 55 50 49 44 43 40 39 36 35 32 31 30 29 6 2

and Angelus 105

and Record 45 46