The Utica N.Y. may be a different Marshall? There are alot of Marshall ads pre 1840. Kinda hard to tell between them. Diggers book states it has a pleasant flavor and it's immediate effect, after being cured, is aggreeable.
That is one, killer, little bottle.I am far from an expert but a rolled lip would be odd for a 30's medicine.It still looks alot earlier than the common mold.Congrats