Fellow who's haying my place now uses an "H" for the rake, but is baling (big round baler, didn't catch the model) with a big IH 856 (100 PTO HP, probably goes around 11,000 lb the way he has it set up.
Not going to be confused for a compact.
Would love to have a "good" reason to have an old letter or hundred-series <font color=red>Farmall</font color=red> around (outside of just because /w3tcompact/icons/smile.gif) but actually regularly using a tractor of that vintage gives me pause everytime I read of a farmer flipping one. (Still happens around here all too often. /w3tcompact/icons/sad.gif)
I believe there are ROPS out there for the oldtimers but that just "looks" so wrong. If you don't have one on yours, keep the shiny side up!
You have the narrow or wide front end on yours?