Plenty to read on the internet:
Calibers 7902, 7912 and then 7922, all ETA-Valjoux 7750-s with some improvements and weekday in 4 languages. Later only in English.
Regarding dials and hands first Tritium, then SLN. First only classic dial, then Spitfire option with dials in silver and black.
Crown first with fish-symbol then the IWC - Probus Scafusia.
Glass first without, then with both side AR treatment.
Mk.I. and Mk.II. bracelets differ only in styling - most prefer Mk.I. - including me. Later some time clasp was a bit strengthened as it opened sometimes unwanted. Leather strap variations of course. Prefer folding clasp for the croco straps, while the more stylish pin buckle for the less expensive calfskin leather.
I have one from 1998 without AR treatment, with fish-crown, cal. 7922 and Mk.I.
bracelet. Only Tritium dial and hands were updated for SLN-ones, I have changed calender discs to black ones to gain a more harmonic dial though. Love this combo.
Hope this helps.