My interest is in a barrel I got off e-bay that stated it was off a clone for an unknown make ...It is marked ...COLT'S PT.F.A. MFG.Co.HARTFORD CT. USA ...It also has the 45 COLT stamped on the left side...I would say it is an original Colt barrel but the it doesn't have the COLT SINGLE ACTION ARMY on the barrel,,Even if it was an early first generation barrel ,,it doesn't have a front sight like any on the first or second gen. colts I seen..The front sight is .740 long at the base ,and .207 wide at the base and tapers to .094 at it's top.The height is .363 and it doesn't look like it has been filed... The threads are 20 tpi...I thought I heard at one time ASM might have used the colt markings ..But can not find any info .