I have an old oliver one row horse drawn planter. Does anybody know anything about these things? I am having trouble finding any info at all on this thing. It is a restoration project. I need the seed plates for it but I need to figure out the model before I can start looking for or making them. I am just about stumped over this thing and that is VERY hard to do to me when it comes to old farm equipment but there just ain't that much oliver stuff around here.