![My newest catch, working vintage Seiko stopwatch. Dial says [90-5060T] and back says [90-5040]. The movement says Seikosha, Seiko branch. I cannot find more details, or production year. Anyone more info? : My newest catch, working vintage Seiko stopwatch. Dial says [90-5060T] and back says [90-5040]. The movement says Seikosha, Seiko branch. I cannot find more details, or production year. Anyone more info? :](https://i.redd.it/0x261m7m7cg71.jpg)
My newest catch, working vintage Seiko stopwatch. Dial says [90-5060T] and back says [90-5040]. The movement says Seikosha, Seiko branch. I cannot find more details, or production year. Anyone more info? :
![Amazon.co.jp: [Seiko] Seiko Sport Tech Stopwatch Analog Black Overseas Model [Reverse Imported] : Sports & Outdoors Amazon.co.jp: [Seiko] Seiko Sport Tech Stopwatch Analog Black Overseas Model [Reverse Imported] : Sports & Outdoors](https://m.media-amazon.com/images/I/71LTz7FmQFL._AC_UX679_.jpg)
Amazon.co.jp: [Seiko] Seiko Sport Tech Stopwatch Analog Black Overseas Model [Reverse Imported] : Sports & Outdoors
![中古】SEIKO ストップウォッチ『 セイコースポーツ 1/5秒30分計測 』『 SEIKO STOPWATCH 1/5 60分計 』二箇 の落札情報詳細| ヤフオク落札価格情報 オークフリー・スマートフォン版 中古】SEIKO ストップウォッチ『 セイコースポーツ 1/5秒30分計測 』『 SEIKO STOPWATCH 1/5 60分計 』二箇 の落札情報詳細| ヤフオク落札価格情報 オークフリー・スマートフォン版](https://img.aucfree.com/w301611088.1.jpg)