Check their web site
Magazine
Go to Ruger's website. They have a sn look up section.
You can look it up at the Ruger website, under Customer Service, historical data.
No such Ruger ever made
Go to the Ruger website, look under customer service, historical data
It is on their web site.
Primarily in the magazines; Mark II has a bolt hol open also
Go to Ruger's web site to find out.
Go to the Ruger website, Customer Service, Historical Data, find your model, and look up the date of manufacture.
Ruger's web site has sn tables.
Ruger's website has extensive sn data. But the Mark III started in 2004, and is still be produced.
Just bought a Ruger Mark II .257 Roberts paid $549.00