Luxor was the house banjo and ukulele brand of musical instrument distributors Horenstein & Sons of New York in the 1920s. They were not manufacturers themselves but distributed Luxor branded instruments (most likely made by JR Stewart , Globe Musical , Stromberg-Voisinet and Kay) to the music trade. San Jose was Horenstein's guitar and mandolin brand.
See also: Luxor guitars.
Source: History of the American Guitar: 1833 to the Present Day. Tony Bacon. 2001