NuTone NU-195 Drape
From the 1941 Catalog:
Bar Chime Models
Decorative grille top and bottom—separately tuned resonators for each of the two chime bars—an exclusive NuTone feature. Specially treated tone bars, concealed within the cover. No other manufacturer uses such costly the chime bars—treated for better tone with our developed formula. Attach to regular bell wiring. Operates on ordinary 8-10 volt transformer or dry cell batteries. (Transformer not packed with chime.)
The NU-195 services one door with two notes, while the NU-295 rings two notes for the front door and a single note for the rear door. Both models were available with an Ivory or Bronze crinkle-painted finish.
NuTone’s Bar Chimes use “Tin Can” style resonators. Both tone-bars are the same length, achieving different notes with different gauge metal. All known similar chimes use tone-bars of different lengths to produce different notes.