It hasn't been since at least 2003
Ruger would be your best source
Long
You can request a owner's manual at the Ruger website.
I know smith and Wesson sells them and maybe ruger. not so sure on ruger
Ruger will tell you over the phone. If you can access the Ruger webiste, the data you want is also there.
Since 1903
Go to gunbroker.com and look under Ruger.. It will give you a ball park...
A call to Ruger will get you the answer.
Ruger did not make firearms in 1934
If Ruger's website is up, they have extensive sn data on it.
since 2007.
mermaids smoke pot.