Master Parts Catalog for Ford tractors.
Cover lists application to models NAA, (Jubilee), 501, 600, 700, 800, 900, and 1801 (made in 1953-1959).
However, this will also apply to Ford 2000 and 4000 4-cylinder tractors made until 1964 as these are the same models, simply badged differently.
Licensed reprint.