That's a British Service Revolver in .38/200, also known as .38 S&W. It is NOT the same as .38 Special. It probably dates to about 1940. These guns were provided by S&W under contract to the British Government. A few went to other Commonwealth countries too, like the Union of South Africa. Do you see any British proof marks or ordnance stamps on it?
The six inch barrel is a little unusual. Most of the commonwealth revolvers had five-inch barrels.
Those are the wrong stocks; that wood dates from after 1968. If you look up the words "Victory" and "Pre-Victory" with the forum search function, you will find some picture of the way it looked when it shipped.
That gun is a little rough, but not too much so. If you went after it lightly with some oily 0000 steel wool, or maybe some bronze wool, you could knock back some of the light surface rust and make it look a little shinier.
Safe to shoot, but .38 S&W ammo is hard to find. Periodically it comes available through the Internet ammuntion retailers. I just bought about 10 boxes to make sure I have some on hand for my British (and older American) S&Ws. Most people who shoot these shorter .38 revolvers reload for them.
Some of these commonwealth guns had their chambers deepened after the war so they could accept .38 Special. That's not necessarily a good thing, as the shorter round has a slightly wider case, and .38 Special cases can swell or even split when fired in the converted K-200s (as they are called by collectors).