Send it back to Ruger, find a gunsmith.
You need to contact Ruger. You may have a prototype
Ruger has sn data on their website.
Ruger has extensive serial number data on their website.
Ruger's website has a sn function.
ABOUT $200-$300, depending on condition, and WHICH version of the Blackhawk.
400
400
Ruger's website has sn data you can access
Ruger has extensive sn data on their website.
At canadian tire
400 or so
they are the same gun