Nutloose, none of those. A pilot’s watch never had a stop watch facility. It was issued when you joined and replaced if damaged or inaccurate. I had 6/7 in my career and the best and most accurate was the one I handed back on retirement. Surely they give you some sort of timepiece when you retire not take it off you.🤪 Hamilton is a name I remember and one of my watches had a new face stuck on it to hide the date aperture. This cost more as a date function wasn’t in the specification so had to be modified— if you looked carefully by the number 3 you could see the indentation of the hole.
Stop watches were fitted to the aircraft not the pilot.