{"product_id":"aufzugswelle-keyless-stem-ref-6un-fur-seiko-universe-ユニバース-vintage-damenuhr-handaufzug-um-1960-1-stuck-nos","title":"Winding Stem (Keyless Stem) Ref. 6UN for Seiko \"Universe\" (ユニバース) – Vintage Ladies' Hand-Wound Watch, circa 1960 – (1 Piece) – NOS","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eKeyless Stem (巻真) from new old stock (NOS) for the Seiko ladies' watch \"Universe\" (ユニバース). This offer is for a single piece, taken from an original pack labeled \"SEIKO KEYLESS STEMS,\" with the reference \"6UN (ユニバース)\" and content \"1 DZ.\" (one dozen). The pack also bears the manufacturer's mark \"K.K.S.\" with the S-in-hexagon signet.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe Seiko \"Universe\" is one of the more remarkable Japanese ladies' watches of its time. A documented example dates from around 1960 (Shōwa 35) and is a hand-wound watch. The pricing at the time is revealing: with an entry-level salary for university graduates of around 12,000 Yen per month, the Universe cost 13,000 Yen – equivalent to a good month's salary, meaning it was not an everyday item but a significant purchase. This also explains why surviving examples today are usually meticulously cared for, and restorers value historically accurate replacement parts.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe winding stem transmits power from the crown to the winding wheel and controls the change between winding and hand-setting positions via the setting lever detent. It is one of the components most directly stressed in daily use: a broken thread - a typical consequence of a forcibly pulled crown - or a worn-out square will immobilize an otherwise intact movement. For ladies' calibers of this size, replacements are particularly difficult to obtain because stems from assortment boxes practically never fit exactly, and re-working the delicate square is hardly possible.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe part is unused. Due to storage, minor, purely cosmetic traces are possible, which do not impair function.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eNote on assignment: Reference \"6UN\" and model designation \"ユニバース\" come from the original packaging. A caliber-specific assignment is not indicated on the packaging; as the Universe was offered in various versions over several years, please compare with the required winding stem before installation.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eOrigin: Japanese spare part, manufactured for Seiko movements (manufacturer mark K.K.S.). The SEIKO brand is used as an intended use indication.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eWarranty (used)\u003c\/strong\u003e\u003cbr\u003eThis is a spare part from old stock (NOS) that has been stored for decades. The statute of limitations for claims for defects (statutory warranty) is 12 months from delivery.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eNote\u003c\/strong\u003e\u003cbr\u003eBefore installation, please compare the stem dimensions and fit with the required winding stem; installation should be carried out professionally.\u003c\/p\u003e","brand":"Vintage \u0026 JDM (Japan Domestic Market)","offers":[{"title":"Default Title","offer_id":54271447957842,"sku":null,"price":12.9,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0911\/3908\/0530\/files\/94C59A7F-EAE1-4FDB-886E-06EFC091A460.jpg?v=1786812974","url":"https:\/\/japanese-microbrands.com\/en\/products\/aufzugswelle-keyless-stem-ref-6un-fur-seiko-universe-%e3%83%a6%e3%83%8b%e3%83%90%e3%83%bc%e3%82%b9-vintage-damenuhr-handaufzug-um-1960-1-stuck-nos","provider":"Japanese Microbrands - Mario Lenke","version":"1.0","type":"link"}