My old 80's TAG Series 1000:
The black coating is very worn now, and the face isn't original, the tiny locating pins broke off, and the face started rotating, cost £90 for a new one, about fifteen years ago. Still ticking away, had three batteries in, at a guess, at £30 a pop!
The next time it goes to my goldsmith mate to change; it doesn't go diving, or even in water, since I haven't worn it for several years, and I'm not prepared to pay that much for a battery for a thirty year old watch.
When I bought it, it cost £250, and a work collegue bought an F1: I think mine was the better watch, but not worth much now, my Yema probably has more value, it's certainly got a better movement.