The most common models of aftermarket seats produced for Allis-Chalmers tractors were made by the Monroe Auto
Equipment Company of Monroe, MI (the shock absorber makers). They were known as E-Z Ride seats.
There were at least two types of E-Z Ride seats made for the B and C tractors, 16006 and 16017.
Item 16006 was the earlier style and was superseded by Item 16017.