The John Deere model "D" was introduced on March 1, 1923 and made till July 3, 1953, the longest production run of all the two-cylinder John Deere tractors built. This first model D was on steel wheels with a 6.5x7.0 inch (later 6.75 x 7.0 inch) two-cylinder hand-cranked engine rated at 15/27 hp (Drawbar/Flywheel). This was not the first tractor with the John Deere name - as several Deere & Co. experimental tractors were built, as well as the John Deere Dain "All Wheel Drive" tractor (during 1918 to 1919 approximately 100 were produced) with the Deere name on them.