Sold at Auction: A Vintage Seiko 5Y66 Quartz Chronograph Gents Watch. Black leather strap. Stainless steel case - 40mm. Black dial with three sub dials. In good condition and working order.
Seiko SNT007 Perpetual Day Calendar Original Japan Men's Quartz Watch] 5Y66-0AC0 : r/Seiko
Seiko Retrograde 5Y66-0AC0 SCJD007 Day Date Stainless Steel Quartz Mens Watch | eBay