And the Italians did fancy a square crossbolt but I haven't found any similar marks:

Scroll down to Fabrication Liegioise Raick Freres:

https://lucianomastrascusa.wordpress.com/bang/

"Raick Freres, un giustapposto dei primi del novecento, in calibro 12, con rimesse in oro su canne e bindella, completamente originale."

Cheers,

Raimey
rse