when I was trucking I was on I 84 the first rest area out of ID into OR they have a little museum or it was it the welcome center. They had a single OX yoke it was different lost the pictures when my house burned down. If any of you get by there stop and take a picture of it post it here. Some one on here would like to see it I'm sure. I have two metal horse collars and the hames are part of the collars 21-22 inch. I also have another that is different has a pipe that goes over the top with leather wear pads on the shoulder part buckles on the top and bottom with hame straps it also has chain tugs. I also have 4 cable tugs with a leather covering the full length of the cable.