Picked up a Casio Chronograph about 25 years ago from a roofing supplies firm in central Oxford, they were advertised as being building site proof!
Still got it, works brilliantly still, had several new batteries obviously and a new strap, but the watch itself has never misted up, or buttons fallen off etc. I use that to start/stop with it counting down with my 2nd running in free time which is only stopped at half/full time. It's handy to 'show' players/managers if they crib about it " Here you are, It's taken us XX minutes to actually play 45"
I like many referees umpire cricket in the summer and obtained my 'shatter-proof' light reacting sun glasses from the same roof supplier, goes to show what can be found for a better price away from sports suppliers if you take time to look (you'll be amazed how often the ball comes straight back at you - with interest - when umpiring at the bowling end, hence the safety glasses)
Not an advert! Other brands are available!!.........(sorry admin lol)