Could a 1675 thin case have pumpkin lume?

[mattg6]

Or would all thin cases be zinc sulfide (which I think would always be white, green, or maybe a tiny bit yellow)

[TuRo]

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/

[mattg6]

Good point on gilt: I’ll refine the question to say “thin case matte dial” (so ‘68-‘69ish). Sounds like you think yes is still the answer