This is a Sunflower model 4212-09 coulter chisel with hydraulic adjustable coulter height and walking tandems. The frame measures 9-1/2' wide plus an extension bracket with one extra shank on each side. The twisted chisel points are worn but I think they all have one new end left and can be turned over. I don't know how old it is but it hasn't been abused, I don't see any patching done anywhere. I haven't used it, it belonged to my wife's parents, but looks like a really nice, solid machine. He pulled it with a 7800 John Deere tractor (145 h.p.). It will be selling on Monday, April 27th, at the Carr Auction consignment sale in Larned, KS.
http://carrauction.com/auction/3-day-spring-farm-shop-consignment-2/