Nope, only the very last revisions (5.8/5.9( had highres screen, the screens used in the older supported models (5.6/5.7) are identical to screen use in even much older revision (maybe even back to the orginal 400MHz Ti). One of the PBs I sold last year actually is an 5.7 in the case and with the display of an 5.5 and I have confirmation thats it's running just fine.
Ah, of course, OK thanks for the clarification!
To be honest I had only looked at the four latest models myself (since the others aren't relevant), and at least in my head I kind of said "screen resolution + 1.67GHz" (which would "triangulate" which of "one of the very latest models ever sold" he has), but I realize it didn't come out that way, hehe.
Anyway, plenty of ideas given to get him going in his detective work. I hope he follow the last advice, by simply trying to boot MorphOS! Nice surprise if it does!