PM Mainspring for Gruen caliber 330, 400, 500 – ONYX Steel
USD 6.00 USD
Specifications
| Country Of Origin | Switzerland |
| MPN | 330/400/500 |
| SKU | PMS-PMS0330S-05 |
| Type | Mainspring |
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. Fulton Watch Crystal Corp Fit-Tite Catalogue No. 2 - reprint.
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