[Farmall] help identifying a plow

[stuard at vaxxine.com]

I have acquired a pair of IHC 2 bottom trail plows.  They are identical and 
what's missing/broken on one is there on the other except for the 
coulters.  The number stamped on the long beam is PO12115 and PO12114 on 
the short beam.  I believe that they are scotch bottoms and neither has a 
rear guide wheel.  They are on steel with the clutch wheel larger that the 
other side.  Does anyone have any idea what model they are?

Doug Stuart
Niagara Falls, Ontario

1949 Farmall BN
1951 JD R