The red tape, etc finally got finished so my Mother could ship down the handgun my grandfather left for me when he died (3 years ago...

Here she is, an unknown year Ruger New Model Super Blackhawk in 44 Magnum!
More detailled images can be found Here
It looks like my grandfather did a custom front sight mod on it

Does anyone know how I can lookup the S/N and see when it was made?