Ruger has extensive serial number data on their website.
Ruger has extensive sn data on their website.
You will have to call Ruger.
Contact Ruger through their website. IIRC, Ruger has information on their website to check date of manufacture.
Ruger's website has information on serial numbers, and year of manufacture. Go to customer service, historical data.
Ruger has a sn function on their web site.
Ruger's website has a sn look up area.
Ruger has extensive sn data on their website.
Ruger has sn data on its website.
If the Ruger website is up, it has sn data
If the Ruger website will work for you, they have sn data.
1983
1971