Welcome to the forum. I own a Colt 2nd generation black powder series 1860 Army. The advertising circular says they continued the serial number series on from the original guns. I recall there may have been a gap. The percussion guns did not get an "SA" suffix."
You might get more response if this thread was moved to the "Colt Percussion Revolvers" forum. As I recall the Model 1860 in the 2nd generation series was introduced in 1978 and discontinued in 1982. Mike Venturino's "Shooting Colt Single Actions" book has more information. He is on this forum as MLV.
Here is one of mine. They are very fine guns.
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You might get more response if this thread was moved to the "Colt Percussion Revolvers" forum. As I recall the Model 1860 in the 2nd generation series was introduced in 1978 and discontinued in 1982. Mike Venturino's "Shooting Colt Single Actions" book has more information. He is on this forum as MLV.
Here is one of mine. They are very fine guns.
