Benrus M Eta 640 … part: mainspring #770 * white alloy *
USD 5.00 USD
Specifications
| Country Of Origin | Switzerland |
| Brand | Eta |
| Compatible Brand | Benrus M |
| Type | Mainspring |
| Color | White |
| Material | Steel |
| MPN | 770 |
Modern white alloy generic mainspring made by DynaFlex. part x4684. Good Luck.
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