I bought this used rear blade last week. I've searched the blade for a name plate or other distinctive markings, to no avail. I've also run several images through Google's image search, with no good hits. The distinctive feature is the pivot for changing the left/right angle of the blade. It has a notched plate at the bottom of that vertical cylinder that interlocks with another part of the cylinder to set the L/R angle. I'd like to identify the manufacturer to see about getting manuals, because I'd like to service it correctly, and replace most of the fasteners. Does the Oracle of Orange Tractor Talks have any idea who made this? TIA for your thoughts.