I had one of those, only mine was an upgraded version with a factory (?) recoil pad. However, that pad had fossilized so that the edges flexed, but the center did not ... basically it focused all the recoil energy in an oval about 3/4 inch across and 1.5 inches high. Yeah, I remember that.
The other "fun" with that gun was my ammo was all early production factory stuff and each shot was a slight hang fire. I could hear the hammer slap as a separate event prior to the gun going off. Never failed to go off, but always a fraction of delay.
That's a hell of a combination if you need to learn how to flinch.
