This is what I read and is very accurate. Thanks. The finish is not original. Every gun that was made in the DGFM was finish with "black oxide". This is a "Rosario made" gun in original condition, here you can see the finish color and the marks of the factory polish, that are parallel lines all over the frame and slide, thats why it was not a bright black finish . Still a very nice gun.First the bad news, the grips are not original. The original grips for this pistol are those made of a black color thermoset material. Now the good news, this is a very interesting pistol, and I will explain why I state so. According to the book Colt . 45 Government Models (Commercial Series), by Charles W. Clawson this pistol was issued to the Argentine Army in 1948, but as it can be seen in the pictures it is not marked EJERCITO ARGENTINO on the right of the slide as the other Army issue Sistema pistols are. Other interesting features are that the serial number that appears on the barrel has the same direction as the axis of the bore instead of being marked across the chamber, and that the serial number is engraved rather than being roll stamped. Barrels with this type of marking were observed on Sistema pistols with serial number higher than 99,999, that according to the book Colt . 45 Government Models (Commercial Series) were made on or after the year 1958. Last but not least, on the right side of the frame of this pistol there are two small marks, one is the letter F under a star, and the other is the letter B under a star. These two markings can be found consistently on Sistema Colt pistols with serial number higher than 110,000, but not on those with serial number lower than 110,000. Again, according Charles W. Clawson, Sistema pistols with serial number higher than 110,000 were made on or after the year 1964. Although there is no documentation that explains all these out of the ordinary features, it is believed that the Argentine Army returned a number of Sistema Colt pistols to the Rosario factory where they were refurbished and reissued to Argentine law enforecement agencies. During the refurbishment program the original barrels were replaced with others of the by then current manufacture. It is not known if the Argentine Army markings were removed or the slides were exchanged. The "star B" and "star F" markings seems to be assemblers or tester markings. It is not known if these refurbished/reissued pistols were refinished as part of the refurbishment program. A small number of pistols similar to the one that appears on the picture are known to exist. All pistols with these features that are known are in very good condition, that is much better than that of other former Argentine pistols. Based on the markings that appear on the barrel and frame it is believed that this pistols were refurbished in the mid 1960's. I do not know if the pistol that appears on the picture was refinished after it was declared surplus in Argentina, or if this finish is the one it got during the refurbishment program. As stated above, this is an interesting pistol and I hope that someday we will have access to documentation that explains the unusual markings.