1956.
Go to the Ruger website, customer service, historical data, pistol, find your model, and there is a serial number/ year of production list.With the serial number that you provided,your Ruger standard model single six revolver was made in 1960.If you have a standard model automatic Mark I pistol,it was made in 1957.
1954. Ruger website, customer service has year of production data.
Impossible to answer without a detailed description and pictures.
The brand is Sturm, Ruger, not Strum- and we cannot tell without a serial number, However, if you visit the Ruger website, look under customer service, historical data, pistol, you can find your model, and the serial number range for year of manufacture.
The numbers 10-21133 are the serial number that was assigned to your Ruger Standard Mark I pistol,which was made in the year 1969.
A call to Ruger will get you the date it was made
Go to the Ruger website, customer service, historical data, revolver, find your model, and there is a serial number/ year of production list.With the serial number that you provided,your ruger single six was made by ruger in 1982.
A Ruger 10/22 with that serial number was made in late 1970. This information is available at Ruger's website, www.ruger.com.
No way to answer without the serial number.
Ruger has sn data on their web site.
About 1953. Ruger lists the serial number ranges of different model firearms on their website, under customer service. Link to yours is below:
Ruger has sn data on their website.