The Allis Chalmers Speed Patrol was produced on the WC frame from somewhere near 1940 to 1950. They were all originally hand wheel operated with no hydraulics. The blade adjustment is not simple either as it is bolted in place, requiring a bit of creativity to reposition it for use. The moldboard is 10 1/2 feet in length and cuts a pretty wide swath up the driveway taking quite a lot of physical effort to raise and lower under load while moving forward.