Vintage AS 721N Balance Wheel & Hairspring – Cal. 5-976 / 11½–1580 – Pre-Owned U
USD 15.99 USD
Specifications
| Country Of Origin | Switzerland |
| Compatible Brand | New Balance |
| Brand | Unbranded |
| Type | Hairspring |
| Compatible Model | 5-976 |
AS 5-976 – Cal. 721N – Balance with flat hairspring (18000 ALT). AS 11½–1580 – Cal. 721N – Balance with flat hairspring. Both pieces appear original and intact, with fine spiral hairsprings.
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