Today's watch is another Casio designed for the outdoors, but not a G-Shock!
This one is one of the Twin Sensor Alt-Thermo watches called the ALT-6000. It came out in 1991, and has a look that is very similar to the G-Shock designs.
The watch has two displays, a normal 2-line LCD display (each line with 6 digits), and a green backed dot matrix LCD display.
It uses a 950 module to run the watch which has alarm and stopwatch functions as well as the sensor functions. Sensor-wise it has both a barometer based altimeter and a temperature sensor. The altimeter should be calibrated (by using the adjust button when in the height mode) for a known height before each trip but is quite accurate after that. The dot matrix shows a little graph of your height change while you use this. Up to 50 data points of height and temperature can be stored too.
It came out in 1984
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DeleteBought mine new in 1995 from Dixons! Still in daily use and in perfect working order. Even the bulb works!
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