細節
Columbia Phonograph Co. Genl:
photograph of a shop front; another of the interior, showing early Grafonolas; another, of a typing pool with Dictaphones in use; and two others, of a switchboard and a switchboard or dictating machine in a Davenport desk, early 20th century (5)
photograph of a shop front; another of the interior, showing early Grafonolas; another, of a typing pool with Dictaphones in use; and two others, of a switchboard and a switchboard or dictating machine in a Davenport desk, early 20th century (5)