Okay, I can see I have some homework. I will try to get the information mentioned when I get home from work.
Thanks everyone for their input.
One question I can answer - the name "Ferdinand Berthoud" is visible on the photo I posted, it is just behind the large dial.
As for other engravings, I have not seen any, however, I have not really looked carefully, so I will check that in the afternoon as well.