That is one of Casio's more interesting ana-digi "modules" (Casio-speak for
movements) and they use it in forty or fifty different watches. This is a Casio Edifice EFA 131D-1A2V. Isn't that a catchy name? It is your G-Shock's first cousin once removed.
The module interested me because the analog hands automatically sync with the digital readout, and the stopwatch functions more than made up (so I thought) for the missing analog second sweep. I liked the look of blue on black, and I still do. Also, I wanted one watch with a good "integral" steel bracelet. Integral bracelets are tapered to match the curve of the watch's case and they look very massive and cool, in a 1950s I.D. bracelet way their drawback being that you can't replace the manufacturer's damned bracelet with anything but another one (if you can find it). This particular bracelet is as good as a Seiko Superior's, and I thought it made this $80 watch a good buy.
Because this is an inexpensive module for inexpensive watches, the LED displays are not backlit. There is a tiny amber bulb recessed under the bottom of the dial, to illuminate the analog hands but not the LEDs in the dark. Since I only need to know the time of night at night, I have not found this to be a drawback.
What I
have found to be a drawback are the negative LEDs, which can only be read in good light from just the right angle. I decided after the fact that I should have bought this
and I may do so yet if I find one under $80, even though it lacks the coolitude of a solid-link integral bracelet. I still wear the negative display Casio, most often while changing to or from Daylight Saving Time (DST).

