ⓘ Casio – edited
The Casio Edifice EFS-S660D-1AJF and EFS-S660PB-1AJF.
Casio’s Edifice EFS-S660 is now official. The lineup includes a steel-bracelet EFS-S660D-1AJF and rubber-strapped EFS-S660PB-1AJF, both ¥33,000 (~$208). Solar chronograph, 10-bar WR, sapphire crystal. The PB variant carries new Toyota Racing branding. Ships August 2026.
The Edifice EFS-S660 is officially on Casio Japan’s site now. This closes the loop on renders that leaked a while back — the honeycomb-textured solar dial, the inner-ring tachymeter, and the compact 38.3 mm width all check out exactly as those images suggested. Two references are listed for August 2026, both priced at ¥33,000 (about $206): the steel-bracelet EFS-S660D-1AJF and the resin-strapped EFS-S660PB-1AJF.
Both these watches have different personalities. EFS-S660D-1AJF goes with a stainless steel case and bracelet, blue chronograph hands, and a 129-gram build. EFS-S660PB-1AJF gets a rubber strap with gray IP-coated case and black IP bezel, swaps in red chronograph hands, and drops to a much lighter 71 grams. Plus, it’s the one carrying new context the leaks didn’t have: official marketing art ties it directly to the Toyota Racing partnership. It is branded alongside Toyota’s GR race cars rather than sold as a standalone chronograph.
Underneath the design, both share a 45.3 x 38.3 x 11.6 mm case, sapphire crystal with internal anti-reflective coating, 10-bar water resistance, and a 1/20-second stopwatch measuring up to 60 minutes with split timing. Chronograph hands are fixed at the 12 o’clock position for faster reading at a glance, a tachymeter scale runs along the outer edge of the dial rather than the bezel, and the textured dial surface is designed to let light through to the solar cell without looking like an obvious solar watch. Casio’s solar charging system is rated for roughly five months of running time on a full charge without further light exposure, with average monthly accuracy holding around ±20 seconds. This is pretty solid, if unremarkable, for a solar quartz movement at this price.
Both references are now open for pre-order on Casio Japan’s site. Alternatively, you can check out the Casio Edifice EF-527D-1AVEF on Amazon.
Anubhav Sharma – Senior Tech Writer – 1804 articles published on Notebookcheck since 2024
Most of my time goes into writing – and somehow it hasn’t stopped being fun yet.
My work mainly revolves around everyday tech, gaming, watches, DIY modding, and the occasional piece on tech-policy chaos when companies and governments clash. I try to keep things simple and honest, without sounding like a product brochure.
I have a Bachelor’s degree in Computer Science Engineering and an Associate Degree in English Studies from the College of New Caledonia in British Columbia, Canada.
Away from articles and deadlines, life usually shifts to making music, taking photos, or trying to finish games that should have been completed months ago.