So the 'X' could be in another spot on the frame, possibly obscured by wear ? Do you know when percussion reproductions were first made in Italy, before they were imported to the US ? Why were the spaghetti Western films featuring brass frame revolvers- simply costs, or something else ?
I FOUND THE THREAD ABOUT THE FIRST C&B REPRODUCTIONS:
The Gun That Started It All -->>>
https://www.thehighroad.org/index.php?threads/the-gun-that-started-it-all.845902/
That has all been posted before about Val Forget making the 1st arrangements with the Italians, and having an original sent over to Italy to be made into a prototype.
It's been a while, but perhaps mid to late 1950's?
And IIRC Forgett was dealing with Uberti who made the first ones under Gregorelli & Uberti.
I don't want to pre-suppose that's who made your gun, but it was not an over-night process.
And Val Forgett, the owner of Navy Arms went to Italy and even considered having the guns made in Germany
I'm not going to look it up right now.
But at the top left corner of the Uberti home page, in small letters it says, "
Uberti – top quality firearms replicas from 1959" --->>> https://www.ubertireplicas.com
And from the CAS City Forum, Fingers McGee stated in reply to a question about the first GU models,
"IIRC, it was those and the 1860 Army & 1861 Navy. The 1851 Navy and Griswold & Gunnison were the first 16 replicas made in 1958 (10 Navies and 6 Griswolds)"
--->>> See Reply #1
https://www.cascity.com/forumhall/index.php?topic=55574.0
I'm not sure I ever understood what security was being breached by posting serial #s, that said this one is A206x. It appears on the frame bottom, under the barrel hidden by the lever and inside the grip strap.
That seems to be a very low serial number and whether it was made by GU or ASM, if it's one of the 1st 2,000 or so 1860's made, then you have an early production gun.
Maybe it's an early enough production that the company trademark stamp hadn't even been made yet.
But that's why I believe that the proof test date code is actually 1962 and not 1952.