About 1953. Ruger lists the serial number ranges of different model firearms on their website, under customer service. Link to yours is below:
You can get a manual for free at Ruger's web site.
You can request a owner's manual at the Ruger website.
Go to the Ruger website. There is a section to date your 22 by serial number.
Is it a revolver or semi-auto? You can go to Ruger's website to look up the serial number.
Sturm Ruger still makes magazines for that pistol. They are the same ones used in their MK I variant and have a 9 round capacity. The subsequent variants, the MK II and MK III . They can be purchased on-line at the Sturm Ruger website, and are commonly available at gun shops.
Ruger has sn data on their web site. 100-375 USD
100-400 or so
300 or so
very little market for ruger auto pistols, i would estimate 320 dollars or so depending on condition
100-200
10-200 USD or so
Depending on condition, 50-175 USD.