{"product_id":"bestfit-2-piece-stem-winding-arbor-for-mst-352-371-waterproof-watches-340-31","title":"Bestfit 2-piece stem \/ winding arbor #340\/31 for MST caliber 352, 371 Waterproof Watches","description":"\u003cp\u003eONE\u003cstrong\u003e Bestfit\u003c\/strong\u003e 2-piece MALE stem for MST caliber 352, 371 and perhaps 420 movements, from the Bestfit Assortment #340 of waterproof stems, No. 31, new in envelope. These came in a couple of different lengths and this one is a SHORT model. See images for further details. \u003cspan\u003eFitting stems without the original is as much of an art as it is a science, especially with waterproof stems, as setting the correct stem length is critical to the crown achieving a good waterproof seal. \u003c\/span\u003eI specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. If you need a part for an American watch I likely have it. Images do a pretty good job of representing the item. \u003cbr\u003e\u003c\/p\u003e","brand":"Bestfit","offers":[{"title":"Default Title","offer_id":49141928132916,"sku":"SWW-BEST34031ST-06","price":6.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0849\/3341\/1124\/files\/2026-06-0118.28.35.jpg?v=1780364309","url":"https:\/\/www.vintagetimeparts.com\/products\/bestfit-2-piece-stem-winding-arbor-for-mst-352-371-waterproof-watches-340-31","provider":"Vintage Time Parts","version":"1.0","type":"link"}