Samuel Colt manufactured his first revolvers in 1837. There were earlier revolving firearms, called 'peperboxes', which had multiple barrels that revolved around a central axis, but Colt figured out how to connect multiple chambers to a single barrel and automatically advance a new chamber each time the hammer was cocked. Colt refused to make a double-action revolver that could be fired without first cocking the hammer.
It might be eaiser to ask who in Beligum didn't make a revolver.
In the USA
Samuel Colt
Serial number shows it is a single action revolver made someime after 1978.
In the USA
Many were
Samuel Colt invented the revolver in 1836
38 cal colt's revolver sn 94764 what year was it made?
You will have to be more specific.
Not much.
No sn data
Impossible to answer without knowing who made it.