Hello i just picked up this beautiful 1000m with extract that dates to 1976 -Searched for a long time to find this baby - wanted to ask about the type 1 dial and see if people have experience with this dial - Should i try and gently clean it up ? Leave as is ? Will it continue to get worse or do do these dials stabilize and it will stay close to this condition for years ? Thanks for any advice on the dial or other condition concerns- Cheers
Once started, difficult to say further patination (aka deterioration) can be stopped. A service with new seals should certainly slow the process. I'd leave the dial is is. Cleaning it has a much larger chance of making it worse rather than better.