The original announcement from Casio said they'd be making a ring version of the venerable DBC-611 calculator watch as well: <a href="https://www.g-central.com/casio-to-release-casio-watch-ring-collection-capsule-toys/" rel="nofollow">https://www.g-central.com/casio-to-release-casio-watch-ring-...</a><p>It looks like they've instead made a ring version of the CA-53W, which - in the staggeringly few times I see someone wearing a calculator watch - is usually the one they're wearing.<p>I still wear a DBC-610 as my daily driver, and I do use the calculator and countdown timer features quite often.