What I know about your High Standard is that the grip on the "military" models were reconfigured to conform to the grip angles and feel of the 1911 pistol being used in Bullseye matches; the idea apparently being to minimize the transition in terms of handling and feel from when shooting the .22 rimfire class pistols to going to the .45 centerfire class, where most people were shooting the 1911 pistol.
This design was introduced in 1965 and continued through most of 1968. Like most High Standard pistols made during this era, the Model 106 Supermatic Citation Military Model was a very well-made and finished pistol, designed to compete with the best target pistols on the market at the time and used chiefly in Bullseye meets. It is a very desirable pistol to collectors and to the few but discriminating shooters who still use the pistol in Bullseye matches.
Sorry, someone else will have to help out re your Colt.