Maybe the fact that the SA notch was broken of is the reason this revolver is used very little. Who knows when it broke, can be a few years after production and was placed in a drawer for decades or more.
"Rolland & Renault" is listed on page 350 in the book "Qui est Qui de l'Arme Française" as "armuriers à Paris en 1871-1872 armes de luxe et de guerre, 3 boulevard Saint Martin à Paris" what translate as "gunshop in Paris in 1871-1872 weapons luxury and war". Since this revolver has Liège proof marks it is most likely that this weapon was made
Liège by an other maker. commissioned by R&R.
Looking for info I came across a very similar looking revolver but sold under the name Lebaron. This Lebaron I found at Horst Held, here the page as PDF. Also on Littlegun.be a similar, unmarked revolver can be found, see here.
I would love to know more and anyone who can tell me more about the actual maker or about Rolland & Renault, I appreciate it much!