Contact ruger and request a owner's manual
No such weapon. It is either a Mark II pistol or a Redhawk Revolver.
50-225
50-200 USD
You can request a owner's manual at the Ruger website.
50-175 USD
75-260 or so
Which one?...The Mark 1's and Mark 2's are pretty valuable...
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.
Ruger will tell you if you phone customer service.
50-260 USD
125 or so