It looks to me like those barrels started life as extractor barrels by the plugged screw hole in the middle of the lug. Quite a project to change or modify the rib extension from an extractor style to an ejector style!
I doubt Remington Arms Co. Inc. would have had anything to do with fitting a set of Damascus barrels to a gun in that late time frame.
Damascus barrel warning pg 1.jpg
I checked and I have pictures of 241182 in my files, a 16-gauge, 1-frame, VHE, with a December 1938 date code on the left barrel flat.