You've got a great revolver. It was the prototype for the Model 13 .357 Magnum Military & Police Heavy Barrel. I have a 10-3 and a 10-8 and they both a very nice shooters.
Model 10-3 (1962)
Model 13-2 (1979)
Model 10-8 (1981)
The 10-6 remains on my bucket list.