Hudson, N.Y. “STEAM BOAT” in Red on 1832 Folded Letter to New York

Folded letter from Hudson, New York to New York City, postmarked with black 28mm circular HUDSON/NOV/6/N.Y. handstamp and red straightline STEAM BOAT, rated "121/2 in manuscript. The letter concerning Sprague & Curtis's hoop iron.
This STEAM BOAT marking differs notably from similar markings used in New York City beginning in June 1832 until 1834. This marking also differs from the Hudson mark with unique characteristics, including a wide base on the “T”, shape of the "s" and the size. This is a unique example.