Have a look at Christopher Ward - https://www.christopherward.com/dive-watches The C60 Trident looks like it might fit the bill...
Slight wildcard - Casio LTP-V00 range...tank style dress watch for £50ish. It's listed as a ladies watch but check out some real-life wrist shots before dismissing it outright.
I've been on a smaller watch bender over the last 12 months and have had one for around 8 months and until my most recent purchase was my go to daily - no issues with mine hitting the markers although ultimately as you've seen in videos your milage may vary (if I wanted to be ultra pedantic then between 12 and 1 it might be a microscopic amount off). Way better in the flesh this model as well. I'm sure your brother will love it.
I built up slowly, have a range of watches but really only wear my expensive one now. Each to their own though.
This account is verified. WatchCrunch has confirmed that this account is the authentic presence for this person or brand.