I was looking through The Paterson Colt Book by R L Wilson, and I found on page 141 this picture of a Paterson No 5 Ser No 377. In the picture, on the top revolver, you will see an extra hole/screw in addition to the usual trigger and hammer screws. The only other differences between the two guns on the page is the different length barrels, round back/straight back cylinders and different wedges
I've gone through the whole book and cannot find any other examples of this screw on any other Paterson in the book and in all my research I've never see another one like this that is an authenticated original.
What do you all think the extra screw is for? Is this a reproduction despite its provenance?
ALSS
I've gone through the whole book and cannot find any other examples of this screw on any other Paterson in the book and in all my research I've never see another one like this that is an authenticated original.

What do you all think the extra screw is for? Is this a reproduction despite its provenance?
ALSS