Just picked up an O grade #120840 with 30 inch Damascus barrels. Looks to be made in 1904.12 ga. DT, extractors. It has no makers name /stamp on the barrels or rib extension.Serial number and O on the barrel flats. It has what appears to be HWR stamped on each barrel in front of the flats,who is the barrel maker? I can not seem to find it in all the info on the website. Thanks MY