John Olin's Specialty was in Terry Allen's studio for photos several years ago and I saw and handled the gun personally. When I saw the gun it was laying atop a leather case with his name, but I never looked inside the case; I suppose that's why I don't recall having seen anything unusual about the case.
The most remarkable case in which I've observed a Smith gun housed a graded Syracuse Smith hammer gun (seems it was a special ordered 10-bore C Grade). I don't recall all the compartments and accoutrements inside, but do remember it had an extra top section as per the case above that contained numbers of nickeled brass cases.