Hey fellow Massey Diesel collectors,
You may have read the separate thread about the 33 Diesel serial numbers ending with a "P" for the American Bosch PSB fuel injection pump. My older 44 Diesel tractors (1950 and 1952) do not have the "P" after the serial number, but do have the PSB fuel pump.
I think it would be interesting to try and narrow in on when Massey started adding the "P" to the serial number stamping. If those of you who own 33, 44, or 55 Diesel tractors are willing to share your serial numbers, and whether or not they include the "P", we might all learn something. :-)
Thanks,
John