Hi,
I have just got myself a GP from the 50s-60s. It has a cal. 86 movement. I wore it while sleeping last night and it was -10 seconds my Rolex GMT master-2 this morning. Does it need a service? By the way it has a few black spots on the dial. Seems like some kind of paint. Could be aging, can someone tell me how to remove them.
By the way, it is beautiful
Thanks,
Ashish