Jim-I've sent a picture of the rest of the page to Larry,in case it's not legible--under "Attachments":
Belt pulley and power take off equipment:
Belt Pulley and Power Take Off,351 233R91
Belt Pulley,351 441R91,for tractor already equipped with 351 234 R91 Power Take Off
Power Take Off, 351 234R91
Drawbar,Swinging,351 429R91 4.50
I tend to think some dealers chose the simple way to order a Cub--Code 1 in photo on top half of the page.This got you the more common extras like hydraulics,battery ignition,adjustable front axle and swinging drawbar,etc. I went to an old IH dealer auction in Brattleboro,VT in 1999 and there must have been 20 NOS swinging drawbars in a pile in the loft.
How can you have too many Cubs????