Gruen Factory Mainspring for caliber 275, 280, 285 & 540 movements – steel
USD 3.00 USD
Specifications
| Brand | Gruen |
| Country Of Origin | Switzerland |
| MPN | #45 |
| SKU | PMS-GRU0285S-04 |
| 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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