Ruger First-model Blackhawk, Ser. #1002. Built in 1956, I believe.
6 1/2" bbl., aluminum grip frame, a very light gun for a .44 mag. It belonged to the father of a friend, who sold it before I started buying guns in earnest. It had the lightest hair-trigger you'd never want to meet. If you touched the trigger when cocked, the hammer dropped. A bit scary, at first. Later figured out it was very nice.
Shot a full box of those insane Remington Yellow-box 180 grn softpoints that are rated at 1600 fps from a vented 4" barrel. Every shot tried to bury the gun in your forehead. So much for "Lighter bullets recoil LESS."
Hand hurt for a couple of days. Severe recoil opened my thumb knuckle from catching the top of the grip frame when the gun rolled when fired. Made for a bloody floor, as it cut my buddy's thumb too. Ears rang through the ear-plugs. Those Yellow-boxers are VIOLENT!