That's pretty cool, Z. It's great to have heirlooms like that. You're most fortunate.
I have heard that the Remington design was Bill Ruger's favorite but he chose the Colt design for his Blackhawk because it was more recognizable to the general public. The Bearcat is much like the Remington NMA in design. Right down to the grip shape. They're a spectacular little pistol.
Never had one. Always wanted one. Maybe one of these days...