Seiko SRP637K1 mint, came with the original box and books. I wanted a mechanical movement Seiko makes quartz models and that Kinetic hybrid as well. If you want something decent Seiko is hard to beat for the price. Mine is off maybe a minute for a month. Seiko discontinued the SRP637K and SRP637K1 so prices are climbing now you'll see if you check eBay that's where I picked mine up for $300. What I did was save the search and check my emails in the morning from eBay on new ones listed. Oh, the difference between the K and K1 is K made in Japan K1 made in Thailand, same watch.