Vintage Seiko 6139-7070 the "Aquatimer" - myWatchMart
Seiko Chronograph 6139-7070 | Ref. 6139-7070 Watches on Chrono24
Sold at Auction: A Vintage Seiko 6139-7070 Chronograph Automatic Gents Watch. Stainless steel strap and case - 40mm. Blue dial with second sub dial. In working order.