39 M build date

I found a 39 Farmall M for sale, no tag, the only cast date
I could read had 7-31-I on the right rearend housing.
Other casting dates I could partially read also had a 7.

Does anyone have a range of when this tractor was
made?
 
The real low serial number 39"s had no tag. I"m not sure when they started putting serial number tags on them. I have serial number 782 and it has a tag. So, somewhere between 501 and 782 they started putting tags on them! There should be a serial number on the right frame rail below the magneto. As for build date I really can"t help you. I"m sure someone who knows more than me will chime in!
 
It sounds like he's more looking for a month and day when the tractor was built...

I was able to find some information on the Wisconsin Historical Society's website, some build ledgers that showed production information for various tractors. That got me down to the month on some of my collection...
 
(quoted from post at 05:15:14 03/20/13) I found a 39 Farmall M for sale, no tag, the only cast date
I could read had 7-31-I on the right rearend housing.
Other casting dates I could partially read also had a 7.

Does anyone have a range of when this tractor was
made?

The letter "I" designates the year 1939, so the casting code you found indicates a date of July, 31, 1939. Doesn't necessarily mean the entire tractor was built on that date, it only means that particular part was cast on that date. If the engine is original to the tractor, the engine serial number would be the same as the chassis serial number.
 
Trying again
a107704.jpg
 
That is the beginning of IH's fiscal year. Models were according to the calendar year.
 
(quoted from post at 18:20:33 03/20/13) That is the beginning of IH's fiscal year. Models were according to the calendar year.

I thought I heard SMTAs were all '54s but produced around 14 months.
 
somewere I have a break down by serial number sheet and it shows about 50 M being made in July The early M's didnt have a tag and not sure when thy started. My codes are 7*10*I and is the 29th one. Im moving this weekend next week I can try and post that break down or it is listed on the wisc. arcives
 
this is the link to the page with serial numbers break downs

http://content.wisconsinhistory.org/cdm/compoundobject/collection/ihc/id/5478/show/5403/rec/8
 

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