It looks like it has a five inch barrel, which would make it a British Service Revolver, which were made concurrently with the Victory Model, in the same serial number range.
The first 40,000 were manufactured in .38 S&W because S&W were already supplying Great Britain at the time that the new serial number was introduced. Both guns were produced concurrently after that.
If you barrel is marked " .38 S&W CTG" it is a British service revolver. You cannot chamber .38 special in a .38 S&W gun.
If it is marked ".38 S&W Special CTG" then it is a Victory Model. You cannot chamber .38 special in a .38 S&W gun.
Some .38 S&W British Service Revolvers had the cylinders bored through to accept.38 Special and were sold as surplus after WWII. If your gun will chamber .38 Special but is marked for .38 S&W, then it is one of these. These bored through guns should be safe to shoot with standard velocity, standard pressure lead ammunition. Even then you can expect cases to bulge and potentially split, the rear of the .38 S&W chamber is wider than the .38 Special case. For safety's sake never shoot plus P ammunition or unknown handloads through such a gun.
If it hasn't been bored through then it is probably worth $250-$350, depending upon condition. If it has been bored through, maybe $150 or whatever you can negotiate. A million victory models were made,.