OK thanks for the reassurance.
The back of the watch says stainless steel so I'll get buffing
I had a painful experience recently with a pretty cool 70s Citizen Automatic in a big faceted glass case. Had 'Stainless Steel' on the back so I gave it a quick buff with 2000 and Tcut and the f'ing ring around the crystal was plated and is now 'kin brassed.