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Its primary purpose is an outdoor grille (propane). It has been on & off Ebay multiple times (2+ years), and the seller wants a large amount of green for the thing...
Hudson Essex Terraplane Club website
HET Club on Facebook
Adam - We are a small group here, who notice 'Hudson' things.
This particular trailer has been around for a while, and 'last month' was not the first time it has been listed for sale.
I will say this (not having seen it in person) - It does appear to be high-quality workmanship/craftsmanship, and a somewhat unique design. Something that would catch a person's eye, for that 'second look'...