Before making any other comments, it is a coincidence that
the numerals '6', '7', and '9' are somewhat idiosyncratic and
also appear only once each in your sample.
I say 'idiosyncratic' because I just googled 'handwritten numerals'
and simply do not see many 7's where the writer uses a right angle
to start the descending part, nor any cases where the closing
loop for the 9 is NOT angled up or at least finishing horizontally.
There is also a conscious decision to make the 6 and 9 asymmetrical.
Since the annotator is so meticulously consistent, I am assuming
that those numerals are very similar on other pages.
Also, is there a case where the payoffs go into the thousands?
I would like to see how they handled that.
