The 1929 ad for "Parker Long Range Duck Guns" mentions that such guns have been available for twenty years. I guess we knew that since #3 frame 12 gauge guns had been made during all phases of hammerless Parker production. They were the real Parker wildfowlers. Unfortunately, the 1929 and later versions of 3" chamber guns were made on 1 1/2 frames and were not the heavy guns they were proclaimed to be. Every one I have examined has been the normal 7 1/2 pound range, like the average 12 gauge Parker of the time. Parkers with long chambers had been made to order for decades. One example is an early PH (or NH) grade ten gauge Twist Steel gun in my collection that letters as a 3 1/2" gun. The 1929 ad is an invention of the PR department, not a development from the factory floor.