Between January and March 1944.
between November 1944 and January 1945.
It was a manufacturing code.
It wouldn't. Only one will ID the barrel maker. The other could be an inspector mark, date mark, proof code, etc..
The manufacture date is when the rifle was made.
December 1942
The date a product has been manufactured on.
You can buy a book that will cost some money or you can just post the serial number on here and I can answer it. You can also google "M1 Garand born on date" and that will give you manufacture dates of the various manufacturers.
Try oldguns.net
September 1942 to February 1944.
The Universal M1 Carbine is a variant of the original M1 Carbine, which was first developed during World War II. Universal Firearms began producing its version of the M1 Carbine in the 1960s. Therefore, a Universal M1 Carbine would typically be around 50 to 60 years old, depending on its specific production date.
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