Yes the hieroglyphic depiction of Hathor means the mansion of Horus, see picture below. However neither Rutledge nor Wilkinson who are the authors of the two seminal books on Egyptian deities report any falcon-headed goddess. The latter does not also refer to a nome patroness.
I am still some days in the Ardennes. I don't know a goddes, represented as this amulet, but in the late period, there were many changes. I don t know this seller, butI can recommand him for cois, neither for explication neither for prices, so in this optiôn I think you are right, albert
