I finally found an online link to the Simplicity "Belt and Blade Ready Reference" from 2008. It goes back to the late 1960's and has all part numbers as well as dimensions of each belt. It covers just about every type of machine made during that period. I thought many of you could use this. Grab it now -- the one-and-only link I previously had died 2 years ago.
3.5 Meg pdf file, 173 pages.
http://www.tbs.dk/userfiles/Simplicity REM OG knivoversigt.pdf
3.5 Meg pdf file, 173 pages.
http://www.tbs.dk/userfiles/Simplicity REM OG knivoversigt.pdf