The F-84W is especially great for smaller wrists. Unlike many other digital watches, it doesn’t look bulky at all. Nguyen, Khoi (August 31, 2018). "Casio F91W Review - Retro Digital Sport Watch". Gentleman Within (review) . Retrieved August 28, 2019.

Casio F-91W – the classic quartz digital watch". ICON (published August 19, 2011). August 19, 2011. Archived from the original on July 29, 2019 . Retrieved August 6, 2019.The lower left button, labelled "Mode", cycles the modes of the watch: time display, alarm, stopwatch, and time/date adjustment. Casio digital watches have been around for decades, and they’re some of the most popular watches on the market. They’re cheap, reliable, and well-designed.

Sensor Watch — an unofficial open-source hardware circuit board replacement for original F-91W and A158W watches, based on ARM Cortex M0+ microchip with various additional sensors. [27] [28] [29] [30] [31] [32] [33] [34] In any case, it’s odd, isn’t it? The 91 is “supposedly” the chunkier watch and yet the 84 seems to have been designed for a wider variety of wrist sizes. To further ram home the point that the Casio F-84W is the more delicate model, the resin strap is cut differently. The third to last hole was the max for my six-inch wrist. With the ’91’ however, the fifth to last hole was where I called it.In addition, there are plans to sell iPad and MacBook case handmade from material representative of the Nishijin-ori used to make Japanese kimonos. And if you’re into the vintage design as much as I am, then you’ll get a lot of mileage out of this inexpensive watch.