Bidspirit auction | Wm. J. Hartwig Co. Detroit

Wm. J. Hartwig Co. Detroit Mich Wood Cased Electric Annunciator Indicator The Knapp Private Dining R Crews Dining R - Wooden cased electric annunciator or call indicator panel manufactured by Wm. J. Hartwig Co. of Detroit, Mich. Features labeled indicators for The Knapp Private Dining R and Crews Dining R, with a top-mounted call bell housing. The glass face displays metal indicator needles over the text markings. Measures approximately in a wall-mountable wooden housing with visible mounting screws.