Gary, this is all I could find on these tractors. This is the excerpt from Tractor & Gas Engine Review published in Madison, WI Jan. 1918, Vol. 11
One of the new tractor companies is the Depue Brothers Manufacturering Company of Clinton, IA. Their tractor is a four wheel drive type. The drive is through a large bevel ring gear secured to the upright drive haft, which in turn delivers the power to a heavy type differential on each axle assembly. This arrangement makes possible the same traction power in the turning as in the straight ahead.
All of the gears are run in oil and roller bearings are used throughout, therefore a relatively high transmission efficiency is obtained. All working parts are enclosed and protected from dust and dirt.
The tandard equipment includes a four cylinder Buda motor, a Dixie high tension magneto with impulse starter, Pierce governor, Stromberg carb, Borg & Beck dry plate clutch and Timken roller bearings.
At the present the Depue tractor is built in 1 size only. A machine which weighs approx. 8,000lbs has a wheelbase of 140", drive wheels 40" in diameter with 10" tires or fitted removable lugs. Speeds from 1 1/2 - 5 MPH are obtainable, there being 3 forward gears and 1 reverse. The belt pulley can be rotated so as to give a belt speed of 3000' a minute.
A smaller machine will be constructed along the same lines as the larger one which will weigh approx. 4,000lbs and have power at the draw bar to handle 3 plows and other farm implements.