Thanks again Martin, either way, 200 years old, I'm going to tell myself 1797.... :-)
Now to read up on how to fill that gap in the scales, and clean this up without changing anything at all, leaving it as original as it is...no unpinning I guess, gentle hand sanding and some WD-40 possibly to get at the gunk in the pivot pin area...this one stays as original as I can leave it.