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? :
Seiko Mechanical Stopwatch 885051 | eBay
Seiko 88-5051 Vintage Stop Watch Manual Winding Mens Watch Authentic Working - Japan Pre-owned Vintage
SEIKO mechanical stopwatch limited F/S JAPAN | eBay