I have three serial number charts. The first three years are a bit off; one list shows 8 experimental tractors in 1933. From 1936 to 1941 they are in agreement.
Then it all goes nuts!
The chart from TractorData.com does not agree with my "Dunning" JD Tractor Data Book or Yesterday's Tractor chart.
The tractor Data Book agrees for the most part with the chart here at YT.
EXCEPT in the year I'm trying to decipher which coincides with the ending of WWII. There are three tractors in question around the year 1946; Dad's 558312, My 563648, and Uncle Forest's 575930.
From TractorData.com, Dad's and mine are 1946, Forest's is 6320 tractors into 1947.
From the JD Tractor Data Book, all are 1946; Early, Mid, and Late.
Using Yesterday's Tractor chart, Dad's is a late 1945 (which we've always called it; it was sold to him as a 1945). Mine and Forest's are 1946.
The yearly production totals are all over the board, however on my spread sheet the total # of tractors agree on all three!
Here is a screenshot of the spread sheet I made to chart them. Note the color coding.
Let me explain the comparisons on the right side:
Yellow: If charts 1 and 2 agree, Yes or No.
Blue: If charts 2 and 3 agree, Yes or No.
Green: If all three charts agree.
The very bottom boxes indicate how far into the serial numbers for that year that the tractor is.
So, which chart is correct, or does anyone really know?
Then it all goes nuts!
The chart from TractorData.com does not agree with my "Dunning" JD Tractor Data Book or Yesterday's Tractor chart.
The tractor Data Book agrees for the most part with the chart here at YT.
EXCEPT in the year I'm trying to decipher which coincides with the ending of WWII. There are three tractors in question around the year 1946; Dad's 558312, My 563648, and Uncle Forest's 575930.
From TractorData.com, Dad's and mine are 1946, Forest's is 6320 tractors into 1947.
From the JD Tractor Data Book, all are 1946; Early, Mid, and Late.
Using Yesterday's Tractor chart, Dad's is a late 1945 (which we've always called it; it was sold to him as a 1945). Mine and Forest's are 1946.
The yearly production totals are all over the board, however on my spread sheet the total # of tractors agree on all three!
Here is a screenshot of the spread sheet I made to chart them. Note the color coding.
Let me explain the comparisons on the right side:
Yellow: If charts 1 and 2 agree, Yes or No.
Blue: If charts 2 and 3 agree, Yes or No.
Green: If all three charts agree.
The very bottom boxes indicate how far into the serial numbers for that year that the tractor is.
So, which chart is correct, or does anyone really know?