Art Deco Dinanderie metal fish by "Rivierre"

Here we have a magnificent piece of Dinanderie. This is a process of applying different metals onto a surface.
Lucien Gerfaux is a well known exponent of this, his boats/ ships a prime example.( I will post some of these at a later date)
This piece however is by a maker called "Rivierre" who I cannot find any information about.
A large piece, 40cms long.
Any info on this maker welcome.