i think its a IH or a McCormick. if any one has a clue model # or any other info i would love to hear. i just planted @ 2 acres with it and i think its the coolest attachment iv ever used.pull a handle BOOM the disc's drop pull it again BANG it goes back up. its 12 feet wide and i need to replace the back board, not for me I'm 6'5" but the kids need a place to stand while they are helping with the oats... also the hubs need some repair.all the bearings are good but the hub bore seem to be worn.On the list is opener discs all are worn and 1 of the parts that the drop tubes hook on to is cracked luckily the seeds still drop to the ground....... next stop hay rake mower and baler got a line on all but the mower. more on those after i get all the planting done @ 6 acres left. how many 2 wire bales might i get of oat hay on 6 acres? oh and the mouse that was living in the tube scared the crap outta me when he jumped out over my head...