I ran the dates on all 3.
Ruger Blackhawk is 1974, 6.5" I think but haven't measured it
The 357 Highway Patrolman is 67/8 4"
The undercover is '65
I haven't shot any of them, just took them to my gunsmith to be gone thru, tested, cleaned/lubed, etc. The 38 spl is my 2nd BUG when I carry it behind the DB9 pocket BUG and I carry standard non +p ammo in it. I have a couple spare cylinders/parts for the ruger but haven't inventoried it all since I have no plans to sell it, and likely won't shoot it any time soon.