This is being sold as a collector item. Not recommended for any type of use. 

Rare hard to find . Nice piece of history...

watch works perfectly, I can't test the altimeter

Probably works just fine, Aero Indicator SENTINEL Altitude/Altimeter w/Stop-Watch Automatic Parachute release head unit

Please see pictures as they provide the most accurate description.

You will not be disappointed. From a Smoke and Cat Free Home and climate controlled environment. 

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