I concede, I concede! Based on all the evidence presented by uvrelics, James N. and yourself, I have changed my opinion and agree that is most likely is an NPW/S&H. At first, I was convinced that Cunningham's factory produced it, especially after reading at least 4 different accounts of College Hill Arsenal being a separate distinct competitor to NPW, and that he was "the" direct competitor to NPW, but after noting that the CHA examples have blank guards, it appears the attic find is likely indeed a S&H/NPW since there is some obscured blocked stamping on the rusty relic.
Two examples of NPW specimens below appear to show different stamping upon the guard, however, with one being shorter than the other. Were there different guard casts/molds than NPW that could account for the difference? In the pic below, you see my friend's rusty relic in the upper left, with the 2 NPW specimens at top right and bottom left (see the script length difference?), and finally what was listed as an authentic CHA at bottom right, based on the lack of script altogether. Could the longer script NPW simply be a re-pop ? Interesting, and thanks to all who responded previously.
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