The handgun shown in the opposite page( There is a drawn sketch of a pistol on the opposite page) is a caliber .45 ACP pistol, reported to be of Argentine origin. It was imported from that country to the U.S. It is beleived to be an Argentine Sistema Colt.
A definitive identification was not possible because the unusual and cryptic markings applied to the gun, and the fact that the pistol could not be inspected. From the observation of photographs it seems to have all the typical characteristics of a Sistema Colt. This pistol is fitted with checkered brown NOTE: MINE ARE BLACK
plastic grips, with reinforcement righs around the screw holes. These grips seem to be of the U.S. WWII pattern and origin. It is not known if the grips are original or replacement.
About the markings: the serial number is located in several places, in what can be called an "Argentine Pattern"(actually a combination of the patterns used with the "Colt Modelo 1927" and the "Sistema Colt pistols.") The letters and numbers used to mark these pistols are of a styole the resembles that of an old typewriter. The meaning of the marking "I.P" is not known. Argentine sources suggest that it might stand for "Institutos Penales", the school for penitentiary personnel.
This pistol seems to have been made by the Fabrica Militar de Armas Portatiles Domingo Matheu (F.M.A.P.) It has been suggested that this pistol might be a prototype or a pre-production sample of the Sistema Colt, likey made with U.S. made and supplied parts, used to train F.M.A.P. personnel in the manufacture of these pistols. In the other hand, Sistema Colt pistols of early manufacture (low serial number) bear special markings that suggest the use of these last pistols as prototypes or evaluation guns, therefore the "I.P." pistols might be pre-production guns.
Other sources state that thesis is a "sterile" pistol, although the fact that these pistols were exported, almost cancel this possibility.
These guns are known among the collectors as "Argentine I.P. Pistol". At least two are known to be part of a collection in the U.S.
Although not much is know about these pistols, it was included in this section as a possible variation of the Sistema Colt, with the hope that more information will be available in the future, for a next edition of this book.
Originally Posted by wjkuleck
Note: the pistol shown on the opposite page (in the book) shows the same "I.P." markings as (the one pictured in this thread) and it also shows the serial number on the barrel hood and the top of the slide. Also on the top of the slide above the serial number are the letters "I.P" just to the rear of the ejection port on the top of the slide.
Like this: With X representing the serial number.