About

We help people buy a used Seiko or Casio without getting burned. Name the watch you’re after, like an SKX007, a 6309 Turtle, a 6139 chronograph, a SARB033, a DW-5600 or an F-91W, and there’s a page for it. Each one tells you the watch’s story, the specs that matter and what to check in a listing before you buy.

What collectors know about these watches is scattered across forum threads, maker archives and decades of trial and error, and a raw eBay search gives you none of it. So we keep 36 watch pages in one place, write down the tells that usually take years to learn (redialed and franken watches, swapped bezels and hands, tired resin) and pick the listings we’d buy.

We don’t sell watches. No affiliate links. We earn nothing. We’re not affiliated with Seiko or Casio. See how we work for how the pages are researched and our disclosure for how links, picks and photos work.

The Caseback is part of allbutnew, a set of shops for secondhand gear. Got a watch to sell? The “Get an offer” link on every watch page sends it to our watch expert, who replies by email.