These 3 / 6 / 9 / 12 dials are sublime, and among my favourite in the FF Family.
Sincerely, you did well to take it.
The good thing with these Vintage FF is that you have to do a lot of homework before getting one.
But it will always remain a part of Mystery, as you said it very well.
Now, that's one...Where are you hiding the other one???
Huge congrats, not only for the new addition, but also for your superb post.
Can't wait to read Part II!
Best,
Nicolas