Thanks for your responses.I have this 12 gauge made in 1912 and I have a 20 gauge with 30 inch barrels from 1911.Both have pointed side lock plates and two screws on the left side and both have the letter R after the serial number.The 20 gauge weighs about 5lbs 14oz and the 12 weighs about 6.5lbs I am sure both are featherweights.