Here is an early version of the 1851 as manufactured by Greggorelli and Uberti, and marketed by Navy Arms.
![](http://i214.photobucket.com/albums/cc194/StrawHat/Colt%20clones/GU1851002.jpg)
No shield cuts, no cut in the grip strap, no fourth screw, nothing to allow the attachment of a shoulder stock.
There are no safety pins in the cylinder and the hammer does not have the cut for them. It does have a nice square notch for the rear sight.
![](http://i214.photobucket.com/albums/cc194/StrawHat/Colt%20clones/GU1851006.jpg)
This revolver has a couple of things missing, no cylinder engraving and no date stamp. I don't recall when Uberti stopped including Gregorelli in the stamping but it was not very long after the replica industry got going in the 50s. A nice unfired specimen.