At some point, Remington's access to Hawkins pads was cut off, probably during or after the war. A late Remington 31TC in the Remington museum appears to have a Mershon pad. I would assume that gun has never left the factory. I have even seen some late Remington Parkers with Mershon pads that appear to be original. I would presume that the red Hawkins with heart shaped perforations would be correct for a 1941 31TC.