Casio gshock GMD-5600. This is the smaller version of the normal 5600. This original watch had a black case and band with the gold and regular display. I swapped in a white band and case from another GMD-5600. You can see the original black housing from the back but it is not visible while wearing the watch. The watch functions perfectly and was worn very little. I show a picture of it next to a regular 5600 so you can see the size difference. Marketed as a woman's watch to die to its smaller size but it can be worn by us thin-wristed men just as easily.

Specs from Casio below.

Case size (L× W× H)

45.7 × 40.5 × 11.9 mm

Weight

41 g

Case and bezel material

Resin

Band

Resin Band

Construction

Shock Resistant

Water resistance

200-meter water resistance

Power supply and battery life

Approx. battery life: 3 years on CR1616

Glass

Mineral Glass

Compatible band size

145 to 200 mm

Watch Features

Stopwatch

1/100-second stopwatch

Measuring capacity: 00'00''00~59'59''99 (for the first 60 minutes)

1:00'00~23:59'59 (after 60 minutes)

Measuring unit: 1/100 second (for the first 60 minutes)

1 second (after 60 minutes)

Measuring modes: Elapsed time, split time, 1st-2nd place times

Timer

Countdown timer

Measuring unit: 1 second

Countdown range: 24 hours

Countdown start time setting range: 1 second to 24 hours (1-second increments, 1-minute increments and 1-hour increments)

Other: Auto-repeat

Alarm/hourly time signal

Multi-function alarm

Hourly time signal

Flash alert feature

Flash alert

Flashes with buzzer that sounds for alarms, hourly time signals, countdown timer time up alarm

Light

LED backlight (Super Illuminator)

Afterglow

Light color

LED:White

Calendar

Full auto-calendar (to year 2099)

Accuracy

Accuracy: ±15 seconds per month

Other features

12/24-hour format

Regular timekeeping:

Hour, minute, second, pm, month, date, day