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Old 04-12-2004, 05:26 PM
5356f100 5356f100 is offline
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help identify mark

A friend of mine has given me a 239 to use. But I was checking the numbers and before the identifying marks of A13M there is a 64 in a circle. Is this some sort of mark to show it was rebuilt? And if so would that designate the year it was done or identify the mechanic or shop? Thanks
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Old 04-12-2004, 07:53 PM
mtflat mtflat is offline
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Try this website

http://flatheaddrag.com/birthday.html

If I'm reading the chart right I'd say April 13, 1950

If it's a factory rebuild it should have a tag indicating bearing sizes, who, when, etc. Usually when rebuilt they grind off the original build stamping - I'd guess the one you have is stock or done locally if rebuilt.
The 64 in the circle is probably just an inspector number - otherwise unknown.
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Old 04-13-2004, 02:35 AM
5356f100 5356f100 is offline
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You have the date on the block correct. I was curious about the 64 as this I haven't seen before. But I could have sworn I read something about this type of mark but can't remember, drain bamage from a mis-spent youth. I have a chance to pick up two more flatheads, one is possibly a merc. And thanks for the reply.
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Old 04-13-2004, 02:35 AM
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