Tractor name serial number year made plate location ford 1000 u100001 1973. Both you and soundguy have led me to 1981 82 for the build date on my ford 3600 tractor i suspect that the brits built ford 3600s beyond year 1981 which was the last year they were built in the us i have learned that this tractor was built in basildon england which is indicated by the b in front of the serial number. Serial numbers on n series ford tractor engines have been hand stamped on an assembly line and may use odd characters such as a 6 that looks like a lowercase letter b which can make them hard to read once located 9n serial numbers include small star symbols stamped at the beginning and the end of the number sequence. Serial number locations on ford tractors 1939 1964 n series 1939 1952 serial numbers for 9n 2n 8n tractors are located on the left side of the engine block just below the head and behind the oil filter the jubilee naa 1952 1954 serial number location on the first 22238 naa models was on the left front of the