A friend sent me this link to a nice web page by a German collector with
an H316, which is worth perusing.
http://h316.hachti.de/
From this page, select "Stuff", then the "Leonard Kleinrock
materials"
link for some interesting photos of an IMP -- and they are recent. That
page has this link:
http://www.lk.cs.ucla.edu/
Select from the title bar: "Internet history"