By my reading of L.C. Smith Shotguns by Lt. Col. William S. Brophy, it's a No. 2 grade made in 1919. I've got an English stock when the book says that only pistol grips were available. Still, my barrel has an unmistakable "Crown Steel" stamp, and everything else matches quite well the pictures in the book. This is not one of the premier models, though it may be worth something just because it's old and in good condition. The No. 2 gun was advertised as a "knockout" grade, "just the kind for rough usage". A practical birding gun.
By my simple ruler measurements, it's a 12 gauge bore with a 30 inch long barrel. The number "7339" appears prominantly in three places.
I no longer have this gun.