Gruen Factory Mainspring for Gruen caliber 430, 431, 435 & 440 – Steel
USD 10.00 USD
Specifications
| Brand | Gruen |
| Country Of Origin | Switzerland |
| MPN | 45-430 |
| SKU | PMS-GRU0430S-01 |
| Type | Mainspring |
I likely have several of these so the one you get may differ slightly from the images. Images do a pretty good job of representing the item. Waltham Watch Material Catalogue 1909 edition - reprint. South Bend Watch Material Catalog Oct 1928 - reprint.
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