That's outside my area of interest, but I do know there were literally hundreds of different civilian guns based on Webley's bulldog design (like this one), that were churned out by French and Belgian factories during those years, like a northern European version of Khyber Pass guns. This gun could be any of those. A lot of them were even fraudulently marked Bulldog. The hammer and grip on this one say it's not a Webley; what it is? Who can say?
Most are serviceable, some are excellent.