What makes you feel it’s refinished? I was thinking that because I can’t find the exact same dial on any 30CH - just similar ones. In particular the winged hourglass doesn’t seem to be on 30CH dials, which is what made me feel it might be a later refinish
There’s a fair bit of inconsistency to fonts and line weights on that dial, it stands out in a few places like the right hand subdial where it meets the outer track