These were produced in the mid 1960's in Belgium.
The Manufacture was in fact a direct linage back to the Liege Gun manufacturer Sammual Colt commissioned to produce the 1860.
Rather,
REPRODUCTION than replica by definition... They were indeed called the
Certaure' NEW MODEL
1960
If you follow FROC's
Friends of Certaure's a website completely decanted to the models, their history will be revealed.
http://www.1960nma.org/The Guns differ from the Italian manufactured replicas. But like, the Italian guns quality was also hit or miss.
I had, (at least to me) an interesting stewardship on one of these, back when I was working in films.
There is an account, I wrote for the FROC's and I think it is still in their pages.
The River Junction pricing seems steep, but on the other hand
like everything else, is going stratospheric.