As Gabriel says 88-99 most centering around 90-93.
If you're lucky the original bezel turns purple as well a bit.
£8k full set is in the postcode I'd say
This one nice patina but quite a bit toppy.
Hands can be a shade lighter.
Also one to look at are the early 90s 16613 with a so-called 'stardust dial' (another dial lacquer/paint defect), which has thousands of tiny gold specks on the dial which complement the gold writing on the dial and bezel.
Rolex Submariner Date
£9,746
https://chrono24.app/rolex/rolex-sub...GB&SETCURR=GBP