Can anyone help me out with an up to date number as a cross reference for the outer oil seal on Oliver 60 Belt Pulley?  This would be for an H-693, Oil Seal, Pulley Bearing.  Also the local bearing place is telling me that the number listed in the old parts books for the pulley bearings  (HS-5008) and further lists (SKF #6207 Ball Bearing) 2 Required is a metric bearing.  Are they all wet or is there a possibility that this would be a metric bearing.  (It was in stock.)  If so I had no idea that Oliver used anything metric in the 40's!!!