Ruger, Winchester, Henry, Savage, to name a few.
AFIAK, only Ruger knows. You could try asking at RugerForum.com
Southport Connecticut
You will have to find the ATF data for that year. Ruger will not tell you.
These Would Be Ruger 10/22 Rifles. They Are Popular Guns and Are Able to Be Customised Widely With Accessories. They Also Are Manufactured in a Number of Different Models.
The Model 77
Ruger is one.
The company Sturm, Ruger & Co was first set up in 1949, when it first began selling its rifles. Since then, it has enjoyed wide success for its popular rifles.
Ruger's website has extensive sn data.
Ruger has sn information on their web site.
No public data- but you can ask Ruger customer service through their website.
CHINA. It says so on the box.