Tom, if it is more than a couple of years old (five or so), it is almost certainly a rebadged Yamatake mag meter. Yamatake is now marketed as Asbil (don't ask, you probably won't believe the answer). I'd see if I could find a Yamatake/Asbil rep who might do some extra digging for you.
If it is newer than that, it might be an Endress+Hauser rebadge. It isn't the right model number to be the mag meters HON is buying from Krohne now.
Good luck,
Walt Boyes
Editor in Chief
Control and Controlglobal.com www.controlglobal.com
wboyes [at] putman.net