Grand Seiko 5645 – The Seiko Guy,Grand Seiko 5645 – The Seiko Guy,Grand Seiko 5645 – The Seiko Guy,SOLD!!) 36mm • 1970 Vintage Grand Seiko 5645-7000 56GS Hi-Beat 28800bph - E&S Watches,SEIKO TANK Ref. 7830-5000 Quartz Seiko movement Cal. 7830 All original part (head) New leather strap Size 30 x 35 mm Lug width 19 mm Vintage and very good condition #seiko #seikovintage #,