This is indeed a very nice and good quality pistol, so the value should still be "priceless"
Only the screws holding the lock in place look a bit strange, other than that, this is a very neat pistol, worthy of a good collection.
As far as the Cominazzo part, as stated in my earlier post.. i doubt it to be of the family itself, but nevertheless as Fernando points out, this is stil a good quality pistol.