As for all the gadgetry, about all I ever used was the alarm for car parking ticket expiries and the stopwatch for boiling eggs. Do any pilots actually use these things in flight?
My belief is that they're bought mainly for show. That and the odd few 'back-of-fag-packet' calculations in the crew room or the bar.
How true! I have this now rather battered Citizen Promaster Wingman VI - a good and rugged aviators' watch with analogue and digital displays. Also has a fairly accurate E2B 'whizz-wheel' - the problem now is the eyesight - can't see the fine print on the E2B clearly