Sandsteel Sandalloy Mainspring S2224 for Gruen caliber 405, 406, 410, 411, etc –
USD 7.50 USD
Specifications
| Brand | Sandsteel |
| Country Of Origin | United States |
| MPN | S2224 |
| SKU | PMS-SANS2224A-02 |
| 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.