I just inherited this revolver from my late grandfather. I’ve done various research looking to identify it but it seems I have came up short. No numbers listed except for a 5 digit number under the barrel and handle. It is chambered in 22lr and has a four inch barrel. The gun is in rough condition just looking to learn more about it. I will attach pictures. The gun is engraved. Not sure if that’s the way it came or something someone else did. Thanks everyone