Hi Charlie,
Sorry it took me a bit to get back to you on this revolver. It is a 4 inch in 38 special. The serial number on the grip frame has a small ordinance flaming ball stamp before the V and a small stake-like punch mark after the serial number. The top left top strap has a small ordinance flaming ball stamp preceding"U.S. PROPERTY'G.H.D.
The finish appears to be the factory "black magic" finish. The grips are the appropriate smooth walnut and the swivel is present. The revolver doesn't appear to be fired much at all as the recoil shield is unmarked. The only downside is someone filed the back of the front sight to form a ramp instead of the traditional half moon shape.

I hope all this helps, thanks for the approximate dating! Happy New Years!

__________________
Randy
SWCA #2468 SWHF #346