Probably one of the most common dive watches is still the Seiko SKX007. worn&wound | Seiko SKX007 Review - worn&wound .
Can be found under $200 and even more likely around $150. They are a fully mechanical, Seiko built house movement with autowinding. They can last for decades, keep fairly good time (they are mechanical and are not chronometers) and are tough and 200M rated. And, they do not pretend to be a Rolex, Seiko has been making similar dive watches for decades and the SKX007 is the evolution of all of those. It is a 42.5MM case not including crown so big, but not hugely so and they wear well and look good.
A few of my dive watches, the ones I wore a lot over the years or wear a lot now, a few are missing as well but the SKX007 is in the middle with the SP nylon band and another classic Seiko Diver at about 4 o'clock, circa 1972, wore the heck out of it:
The best dive watch I have ever had is the Citizen at 12 o'clock. My wife bought it for me as a joke, it cost $50, never seen one like it before or after, EcoDrive, runs and runs, perfect time. I have had it now for 10 years and it has been on hundreds of dives and I wear it more than any watch, daily even.
Edit to add, the Timex Iron Man watches. I bought my first one when they first came out in the mid 80s to time my swimming laps and, well, I was deep into triathlons (sorta still am from time to time). They are cheap, tough and while I do not especially care for digital displays, they work and make a decent dive watch. if it floods, throw it away, get another. I was wearing one, no five summers ago when I went down and busted my femur bone badly. The watch was ground down to the point the glass should have fallen out. It is/was still going, I tossed it in a drawer somewhere. Battery might be gone now. Just got me another for casual wear and working out. Great disposable watch and usually you can get a few years out of them before they look too grody. Get the Classic I think it is at Walmart, under $40 and rated 200M.
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Can be found under $200 and even more likely around $150. They are a fully mechanical, Seiko built house movement with autowinding. They can last for decades, keep fairly good time (they are mechanical and are not chronometers) and are tough and 200M rated. And, they do not pretend to be a Rolex, Seiko has been making similar dive watches for decades and the SKX007 is the evolution of all of those. It is a 42.5MM case not including crown so big, but not hugely so and they wear well and look good.
A few of my dive watches, the ones I wore a lot over the years or wear a lot now, a few are missing as well but the SKX007 is in the middle with the SP nylon band and another classic Seiko Diver at about 4 o'clock, circa 1972, wore the heck out of it:

The best dive watch I have ever had is the Citizen at 12 o'clock. My wife bought it for me as a joke, it cost $50, never seen one like it before or after, EcoDrive, runs and runs, perfect time. I have had it now for 10 years and it has been on hundreds of dives and I wear it more than any watch, daily even.
Edit to add, the Timex Iron Man watches. I bought my first one when they first came out in the mid 80s to time my swimming laps and, well, I was deep into triathlons (sorta still am from time to time). They are cheap, tough and while I do not especially care for digital displays, they work and make a decent dive watch. if it floods, throw it away, get another. I was wearing one, no five summers ago when I went down and busted my femur bone badly. The watch was ground down to the point the glass should have fallen out. It is/was still going, I tossed it in a drawer somewhere. Battery might be gone now. Just got me another for casual wear and working out. Great disposable watch and usually you can get a few years out of them before they look too grody. Get the Classic I think it is at Walmart, under $40 and rated 200M.
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