Ruger website, under customer service, historical data, revolver, find your model, date ranges are there. Very nice of Ruger to do that.
Ruger has extensive sn data on their website.
You will have to call Ruger.
The serial number on the security six is located on the bottom of the frame under the grip. the year of manufacture can be found here: http://www.ruger.com/Firearms/PS-SerialNumberHistory-RE.html#
Ruger has extensive serial number data on their website.
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 has extensive sn data on their website.
Ruger's website has a sn look up area.
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.