Looks like a model 22
appears to be an 8 foot blade. I guess a 33
http://www.chriscomachinery.com/PullGraders.htm
I have a #33 2J series on steel-looks like yours.
Back wheels tilt and the
rear axle moves from side to side .
Model/serial should be stamped on the left front of the beam.
BullDozerBob
Spokane Wa
It sure looks exactly like the 33 on crisco's site. The 22 in the picture on the site does not have the adjustable hitch or the side shift on the blade.