I have a replica of the stops that I bought about 10 years ago.  I will try to
post pics and some dimensions tomorrow.  I almost had an original ruler for the
100 from eBay a couple of years ago. I placed a bid and the dAy before the
auction ended the seller took it down and said that she found out it was rare
and reposted the piece. It went much more expensive than I could afford.

Brent A Kinsey