This is a Belgian 9mm Pinfire 6 shot revolver with gold studs and maker inlay on the barrel.
Vva Laport & Irmaos. This company shifted from Belgium to Rio de Janeiro in Brazil at the corner of Alfandega & Don Ourives Streets. History of both companies is on Google.
The proof marks are ELG* in an oval and crown Y. Also crown U and number 4 in two places.
The grips look like ivory?
Overall length is 270mm with a 160mm barrel.
One of my better looking revolvers.
