Field Marshall Series II Tractor Detail 2

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Field Marshall Series II Tractor Detail 2

The following list provides basic details of the most important tractors in the Marshall - Field Marshall Range.
Marshall Model 15/30 February 1931 to December 1932.  Prototype first appeared at the National Tractor Trials in 1930.  Three forward and one reverse speed. 550 r.p.m. engine of 8" bore x 10.5" stroke
Marshall Model 18/30 December 1932 to January 1936.  Basically as 15/30 with minor improvements.
Marshall Model 12/20 & Model M January 1936 to June 1945.  Increased power from 700 r.p.m. 6.5" bore x 9" stroke engine.
Field Marshall Series I June 1945 to September 1947.  Further increase in power.  Engine speed 750 r.p.m.
Field Marshall Series II September 1947 to March 1950.  As Series I but with improved exhaust arrangement and other minor improvements.
Field Marshall Series III March 1950 to June 1952.  Dome Top pre-cleaner introduced.  Also six speed gearbox.
Field Marshall Series IIIA June 1952 to 1956.  Further improved by revisions to piston design.  Early versions still in green livery but the vast majority were in the new house colour of orange.