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I know little about GP, so I hope others will chime in. But, looking at aspects of the dial, and especially zoomed in on Mickey, I would say it is a repainted dial. Pretty fun that Mickey is resting on the 9:00 marker, so if you like it then by all means enjoy it.
Phil if you are new to vintage watches, then spend a lot of time reading here before your next purchase, especially all the sticky threads like https://omegaforums.net/threads/learn-how-to-fish.52603/, and feel encouraged to post your next proposed purchase here for opinions before you buy.
All best wishes
It's hard to find a vintage GP with Mickey on Google, this is the only pic I can download. The one I showed earlier does seem low-quality.
It’s a horrible redial with a horrible painted Mickey Mouse and not worth $69 let alone $690
didn't you consider the possibility it is a unicorn-one-off-factory-experimental-prototype-sample-snuck-out-the-back-door? after all I hear those don't have to adhere to the usual quality control.