Dave,
The original pad I removed from the 1923 gun only had the 1917 Pat date.
I could not find a like replacement and moved forward with the project with the 1931 Pat info also.
There were no adaptations like those depicted in the Patent information for screws, screw holes, or hollowed out plug sections.
Only an original Red Rubber base sheet, a kraft gum sealed packet of brads, and the Rubber and Sponge Assembly that is shown.
Will
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