I have just finished restoring (stopping oil leaks and painting) a MM M602 tractor that was ordered special by Del Monte to pull a pea combine. To be used pulling a pea combine, the tractor had to travel at a ground speed of 1/2 mph while maintaining at least a 1400 engine rpm because the PTO on the tractor operated the pickup on the combine. To accomplish this, a 2nd torque was installed between the stock torque and the engine which also made the tractor 12 longer than normal. According to my research, 91 of these tractors were made in 1963-64. I am hoping to get a couple pictures included with this message. My interest in this tractor is based on the fact that in the mid-60s I earned my way through college driving a pea combine in a unit of combines that included a number of these tractors. Enjoy.