HI, this is an accutron...thats all I really know...I cannot date it, although i've had to put a date on the info because i couldnt put 'unknown'
It does have letters/numbers on the case but they are faint...looks like an S or a 5 and the rest i cant read.
The watch was my fathers and any information on it would be appreciated. i may sell it once ive established what it is i've got. its in virtually new condition and very well looked after.