Recently, a friend of mine acquired a Colt Police Positive Special, First Issue which was made around 1924. It is distinguished by its Colt Positive Lock hammer block safety; hard rubber grips; narrow, half moon front sight; substantially curved front strap; smooth trigger; and smooth top strap. Introduced in 1907, it incorporated a longer cylinder and slightly larger frame than its parent, the Police Positive, to accommodate the length and pressure of the .32-20 and .38 Special cartridges which are more powerful alternatives to the .32 Long Colt, .32 Colt New Police (.32 S&W Long), and .38 Colt New Police (.38 S&W). Built on what became known as Colt's D Frame, the petite Police Positive Special weighed just 23 ounces with a four inch barrel. Eleven ounces lighter than its primary competitor, the Smith & Wesson Military and Police Model (later designated the Model 10) it quickly proved popular with police and civilians alike.