Quick chronology of Italian Paterson reproductions:
1. Original design was manufactured by Mainardi Official Fabricators of Replica Arms.
.....Marked MOFRA on the underside of the barrel.
.....Early 1960's through 1970/71 imported by Replica Arms of Marietta, Ohio and Navy Arms after they bought out RA.
2. Same model manufactured by Euromanufacture which was owned by the Mainardi of MOFRA and his brother.
.....Marked with two interlocking diamonds (for the two Mainardi brothers) usually on the underside of the barrel but may be found on the butt strap.
.....1971 through 1980/1981 imported by Navy Arms among others.
3. Same model POSSIBLY manufactured by Palmetto although I personally have not seen one of these.
.....Marked with a palm tree I assume.
.....1981 Palmetto bought Euromanufacture and was then bought later by Euroarms.
.....I do not believe that Euroarms ever manufactured this model.
4. Pietta manufactured the "Texas Paterson" which varied slightly from the other designs.
.....Marked "Texas Paterson" on top of the barrel and "FAP" or Pietta on the side of the barrel or the butt strap.
.....1969 through recent times.
5. Uberti manufactured both a model with out a loading lever in several barrel lengths as well as a model with a loading lever.
.....Marked either with Uberti's name or the "U" inside of a gun muzzle logo.
.....Also found marked with various Gun Collector Society logos.
.....1988 until they recently stopped production.
6. Colt Blackpowder Arms using Uberti supplied parts assembled first a gold trimmed engraved model and later a blued model.
.....1998 through 2002 as Signature Colts or "Third Generation" Colts.
.....Marked as Colts usually are.
References:
1.
https://www.tactical-life.com/firearms/handguns/colt-paterson-reproductions/
2. bp revolver/Dr. Jim Davis post #18 -
https://www.muzzleloadingforum.com/threads/paterson.63623/