Thanks guys.
Yes, even a very modern replica is certainly a possibility. As to an acid mark, I would say that is not too uncommon at the earlier timeline. The size/scale of the hilt could perhaps explain a decorative purpose but then again, the acute point not what one would expect for such.
A 20th century piece would be more likely to be a threaded union but once in hand I might see more clues. It could be all pot metal and cast iron
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Cheers
GC