John Wesley Hardin was carrying a S&W .44 Double Action First Model when he was killed.
S&W 44 Double Action
The First Double-Action Big-Bore Sixguns - American Handgunner
I Have This Old Gun: Smith & Wesson Model 1913
GUNS Magazine Smith & Wesson Model HEG .45 Colt - GUNS Magazine
44 Double Action 1st Model(?)
Smith & Wesson S&W .44-40 WCF Frontier Revolver Double Action, Auto Extracting Revolver - Antique
S&W Model 629-4 Classic DX Double Action Revolver
44/40 1883 Model Double Action Frontier S&W
Antique SMITH & WESSON .44 DOUBLE ACTION First Model Revolver .44 RUSSIAN SINGLE or DOUBLE ACTION .44 Caliber Revolver
GUNS Magazine Big Wheelguns: The First .44s - GUNS Magazine
This Old Gun: Smith & Wesson .44 Double Action First Model
Smith & Wesson .44 Double Action - Internet Movie Firearms Database - Guns in Movies, TV and Video Games
S&W Model I An Official Journal Of The NRA