hunter holster - which handgun

[Fat Boy]

I have obtained a Hunter brand holster in a trade; I don't think it is for the gun it came with, a full-size semi-auto.

The holster is black, basketweave...looks like a duty holster of some type. The back is imprinted with the Hunter brand name and the numbers 3358j54m. A S&W model 19 fits it, but I am not sure if this rig is for revolvers or semi'auto's-

I have checked the Hunter website sizing chart with no success. I would appreciate any information anyone can provide on this holster.

Thanks!