Strangely, bitsavers doesn't have the Monitor II-D
reference.
I've not had time to scan any of the 1620 material in CHM's collection.
The 1620 cards at CHM were read and indexed a while ago, and I read
some more from Doug Martin recently.
I hadn't looked at Dave Babcock's 1620 web site in a long time, looks like
nothing much was ever filled in for it. That's sad, since we have quite a
bit of information on the machine.
http://www.computerhistory.org/projects/ibm_1620/
and
http://jowsey.com/java/sim1620/