I don't know who made it, but I know what it is.
It's the epitome of "Saturday night special."
It looks like it was made in the US ca. 1880-1920, maybe give or take a little.
Are there no markings whatsoever on it?
Is it really a 4-shooter or is that just the way the photo was taken?
It appears to be DAO.
Presumably the cylinder removes for reload.
Is it a .32 or a .38 (something)?
Is it rim or center-fire?
Are the charge holes bored straight-through or are they shouldered?
What doesn't it do now that it did new?
Considering that it probably sold for less than two bucks new, you wouldn't have to repair it to just hang it on the wall.
Just my opinion, but it's not accurate or powerful or valuable enough to be worth spending money on. I wouldn't fix it unless files and a hammer would do it.