I found this watch as a kid burried in the sand at the beach... I washed it in the ocean and gave it a shake and it started working straight away that was over 25 years ago and it still works great. I like the sound it makes when it self winds, different from my quiet seamaster chronometer.

I know its a timex automatic and it is water resistant but I know nothing else... what is it worth? Can I replace the crystal? How? Are there braclets or bands made for it? Where? I have never opened it, what movement is likely inside? Any help is greatly appriciated...