{"product_id":"waltham-watchmakers-watch-mainspring-gauge","title":"Waltham Watchmakers Watch Mainspring Gauge","description":"\u003cp\u003e\u003cstrong\u003eWaltham Watch Mainspring Gauge\u003c\/strong\u003e, marked Waltham, Resilient Mainsprings on the sides and Pat'd Jan.1.07 (1907) underneath.  Measures width and thickness far more accurately than a brass handheld gauge.  Tool is pretty good quality and still in completely functional condition given it's over 100 years old. Images do an adequate job of representing the item. \u003cbr\u003e\u003c\/p\u003e","brand":"Waltham","offers":[{"title":"Default Title","offer_id":48947309904180,"sku":"TMT-WALMSG1907-11","price":50.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2025-11-1610.17.15.jpg?v=1763317466","url":"https:\/\/www.vintagetimeparts.com\/products\/waltham-watchmakers-watch-mainspring-gauge","provider":"Vintage Time Parts","version":"1.0","type":"link"}