So, 1959-67 have the thin case (.3mm only so hardly noticeable), and most therefore house a gilt chapter, gilt non-chapter and the earlier matte dials.
67 (+/- half a year) is the zinc sulphide period, so some could house ZS.
You question about pumpkin patina is a definite yes (if we broadly mean dark patina), as many radium 'swiss' pre 64 go orange/brown, as do many 64-67 tritium T25 dials.
You may already have looked but site here is very informative:
https://gmtmaster1675.com/the-case/