came across this guy

There was no Magazine, it was in 90% condition and It belonged to my wifes grandfather who died in the early 80s.
Basically I was told that I would be getting this when my father in law passes (Brother-in-law is anti gun)
So, what is it?
It says 38 Special, The Magazine doesnt look big enough unless we are talking Wadcutters only.
Also I searched Hi and Low, where the Heck do I get a magazine for this?
How do I find out when it was produced?
Anyone have any experience with these? How do they shoot, ammo picky, ect?