No published history known.
I bought mine on August 15, 1992 and at that time it was a state of the art unit and is still operating well.
February 1946
It is the same as a springfield 511 of Springfield, Savage & Stevens
Means it was made in February 1942. See related links.
The Springfield Savage Model 511 was produced starting in 1939 and continued until around 1948. This double-barrel shotgun was a collaboration between the Springfield Armory and Savage Arms. It was designed primarily for hunting and sport shooting.
The Remington Model 511, a bolt-action .22 caliber rifle, was produced from 1939 to 1968. The "att" code indicates it was manufactured in 1948. Therefore, as of 2023, the Remington Model 511 with the "att" code is 75 years old.
Google Remington scoremaster model 511. Several websites have information on this .22 firearm.
check the date code stamped on the barrel. Remington Society of America, Manufactured Date link has the details.
Try e-gunparts.com
No published data
$225-$250
its a 4 ton