Interesting gun. Colt Grizzly .357 Stainless 6" Barrel Revolver : Revolvers at GunBroker.com
The King Cobra owner's manual threw me as I always thought a Grizzly was a Python. Well, kinda/sorta....
From another listing: a Colt Grizzly is a limited production revolver, .357 Magnum caliber. It is in fact a Colt King Cobra with a ported Python barrel. It has a non-fluted, smooth cylinder and Grizzly rollmarkings.
Thanks for posting. And good luck Marc.