Oliver-Middle To Late 50s

This is called a Drawbar Dynomometer. I think that it is what was used to test the power of whatever is pulling it. When I got it the engine turned over and it is in pretty good shape. I have since got the engine running and it runs flawless. It is an 880 tractor and I have no idea what the transmision is off of. It has a very elaborate drop box on the back of the engine. It looks to me as if this was made in a factory somewhere, it does not look thrown together at all. It has many gauges and valves in the cab for testing certain things. I would love to learn more about it. Where was it made? How many were made? Did it have a model number? What color was it originally, it looks like yellow paint under the grey paint. It looks like everthing is oliver on it. It even has a telescope steering wheel and power steering off of an oliver tractor. The handle getting into the cab even has an oliver number on it. It goes very fast for its size. I had it in 2nd gear and I will guess that it was going about 10 mph. It has a high and low axle and has 4 speeds forward. That would make it 8 speeds forward and 2 reverse. It has a governor that slows down when the engine goes over high idle, I have yet to figure that out. There are a lot of trinkets in the cab that I have not figured out yet. I would appreciate any and all input. If anybody would have any idea what the thing is worth I would like to know that also. My email address is [email protected]. Thanks! Submitted by Lynn, from KS