Well, I followed the advice offered here and got some watch cement from Micromark.
After gluing in a few windows in my Trumpeter C-47, it was quickly obvious that the stuff is the same as good old Testor's tube glue, nothing different at all!
After a couple of years of graduate school in organic chemistry, I can still recognize the toluene and xylene odors from both, and even the consistency is the same. So, nothing special about watch crystal cement from Micromark compared to Testor's tube glue.