As explained to me by a friend who is a British Navy Warrant Officer and a British military historian, many of the Regimentals, as he referred to the Scottish units, were like reserves, and often made up of wealthy individuals. These individuals tended to purchase their own sidearms in many documented cases. Below is my Colt 1902 Military .38 ACP carried by a 1stLt. in 1/8 The Royal Scots.