Casio Men Digital Quartz Watch with Resin Strap F-105W-1A

Product Information

A watch’s water resistance in many cases is entirely notional. It’s pretty rare to see a cheap watch marked “ISO 2281”. The manufacturer estimates a pressure that it estimates there is an acceptably low probability of failure and calls it a day. Even under ISO 2281 testing is only a lot sample procedure. This is why the recommended use scenarios are absurdly conservative, it’s not that going for a swim can generate more than 3 bars of dynamic pressure, it’s that the 3 bar rating is a guideline not a guarantee. One model that Walmart carries that does have it is the A168. If you like a small digital with a steel bracelet, that's your watch. But if it's not, the resin version is the F105W... When you want an F-91W with bigger buttons that are easier to press, this watch nails it. Slim profile, ultra lightweight case, proper beep tone that can be heard easily, and you get slightly better water resistance at 50M instead of the F-91W's 30M. That doesn't count for much, but hey, it has it. On my 6.75" wrist, the F105W lays more flat than the F-91W, which is something I very much appreciate so the watch stays put. Does a nightlight really matter that much?

F-105W-1AWYEF | CASIO Collection | Watches | Products | CASIO

Elapsed time, split time and final time are measured with 1/100-sec accuracy. The watch can measure times of up to 1 hour. The daily alarm reminds you of events that recur every day, by emitting an audible signal at the set time. Where nightlights are concerned, Casio really got it right with this one. It has that just-right luminance that makes it a joy to use. The aqua color and contrast of the nightlight is also perfect. You couldn't ask for better. While I described the W93H as a bit of a dud for me in my last article, the F105W is a total winner in my book.

Model Comparison

For those not in the know, the F105W is like the F-91W, but with one rather important improvement. The nightlight is a million times better. This is why ILLUMINATOR is so prominent on the watch face. Synthetic resin is the ideal material for wrist straps thanks to its extremely durable and flexible properties. For small-wristed folk such as myself that prefer smaller digital timepieces, the go-to brand is Casio for that sort of thing. And the go-to watch in that brand is, of course, the F-91W. I don't know exactly when this watch was introduced to market, but it definitely came shortly after Timex released watches with the the Indiglo nightlight technology in 1992. My guess is that at earliest, the F105W is probably a design from the mid-1990s. Is the F105W exactly the same as the F-91W?

Casio Digital Quartz Alarm Chrono Illuminator F-105W-1ADF

Because of this, it isn’t uncommon to see individual watches exceed their rated pressures, and also to fail well below their rated pressures, even in the same make and model for cheaper watches..

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Technical amendments and errors excepted. The sizes in figures do not correspond to the original sizes.