Casio Pathfinder triple sensor.
A retired First Sergeant's photo from Ghazni, Afghanistan, 2010: a Casio Pathfinder on the wrist over ACUs, in a Blackhawk going through the pass to Wardak province, and the number on the screen is the story. 13,180 feet, read straight off the watch's own altimeter mid flight. His epitaph for the model: they don't make them anymore, which is a shame, because it served me well. What discontinued watch would you buy again new, today, if they made it? If you have a wrist shot from somewhere that matters, submit at the link in bio. Tempus Est Potentia.
Intel Report
Casio Pathfinder Triple Sensor
The Pathfinder was Casio's ABC line for the American market, altimeter, barometer and compass driven by a triple sensor package, solar powered so the sensors never went dark on a dead battery. The name was retired years ago when Casio consolidated the line under Pro Trek globally, which is why the submitter is right that they literally do not make them anymore.
The photo is a small masterpiece of instrument redundancy. A Blackhawk has an altimeter, several in fact, and yet the wrist unit reading 13,180 feet through the pass is doing real work: it is the crew member's own number, on his own arm, requiring no glance across the cockpit and surviving any failure of aircraft power. Aviation has a long tradition of the personal backup instrument, and this is it in its cheapest, most durable form.
Retired references with service records are their own category of watch. Nobody discontinues the miles.