Need help identifying an old gun

[crashdown]

Belongs to a friend, and he has no idea what it is.
Obviously I don't either, or I wouldn't be posting.
He says it is a 5 shot, and the caliber is just a bit bigger than a .22.
No serial number, or identifying marks he can find.
Any help on what it is, and of course what it could be worth would be great.
In his own words:
"it looks slightly better than home made"