That is very interesting.
Yes, I totally understand where you are coming from since I do have a humble experience and particular keen interest in collecting vintage watches.
It does needs a servicing as I would like the bezel to be replaced. And a mechanical servicing would be useful as well since it was not serviced in the past few decades.
I really like this one as it have a very beautiful excellent condition SWISS only dial and I especially like the thin slender hands. Nothing beats the true original AP RO jumbo in my opinion; having own a few different variant of the Jumbo in the past. I know I just need to own the true original after i seen one in the flesh. And as luck has it, I finally found one. And with a rather interesting low number.
I will probably post some additional photos when "he" is back from her spa.
Meantime, she will probably gonna miss him. ;-)
Still searching for info for the ladies "jumbo"...
Thank you again for all the advice and information.