I posted a message with a few Ebay listings of BPA type stuff which was removed as it was against forum rules to "advertise" in the forum, for that I appologize.
Someone had mentioned that they thought the pipe was a model 700 and not a 650 (Hatori).

The box says 650 but that could be wrong as the original owner bought multiple Hatori pipes. Can the person who mentioned this (or anyone else) tell me the difference between the 650 and 700 pipes? I do not remember the Hatori 700.
Thanks,
Stuart