A name written above a doorway in the medium of upholstery tacks. Some later web research suggests that McGrouther-Conradi was a furniture manufacturer. Perhaps they operated out of this building.
Flash wrote in with some more info:
The photo of a name above the doorway (McGrouther Conradi, 17th St. Feb 2008) was the name of a very fine, high-end upholstery manufacturer (not a re-upholstery company) that went out of business sometime in the 1980's. They were a favorite of interior designers and the best of furniture stores, having very sophisticated, mainly traditional upholstery forms. I wish I had kept the catalogue. It was a shame to lose the source.