Seiko Mens stainless sapphire crystal black dial wristwatch 5Y66-0AA0 | eBay
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.
[WTS] Seiko Tonneau Shape Multi Pointer. 5Y66-0AF0. : r/Watchexchange