,So a wooden bodied 22" jointer came into my possession,slight checking on ends,ragged mouth,coated in dirt,all the usual indications of general use,age,and neglect. The iron has a slot for a chip breaker screw,and yes,there is a slot cut for a screw head, but there isn't one the iron being securely held by a wedge,and when it came to me iron was in the b.u. position. The iron has writing that looks like Chapin or Chapelle although it's feint,the iron looks a fair age,cast steel I think and it's quite thick, tapering to more than 3/16ths at the cutting edge. My question is was it common to have jointers with a b.u. Iron or was it b.d.mjust curious.