Rittenhouse Prelude Model Model 550
This combined door chime and dinner call was released simultaneous to the Rittenhouse Precedent. Both were designed by Jean O. Reinecke. This chime was made possible by the then newly-developed Rittenhouse Master Model Controller which could be located discreetly and remotely from the chime.
Reinecke chose to proudly display the polished chime bars instead of hiding them beneath the cover as with most Resonator door chimes. The instructions most likely included a melody book for inspiration as to how to use the mallet for household signaling.
The chime was described in a 1956 merchandise catalog:
Prelude—New, combination electric door chime and dinner chime. Original, different and doubly useful. Makes an ideal gift. Automatically plays choice of 4 or 8-note richly toned melodies for the front door single note for the rear door. Felt mallet is used to play a variety of tunes for announcing dinner and for other household signalling. Makes an attractive accessory for the dining room but can be installed in any location. Sound bars are finished in polished brass with individually tuned sound chambers mounted on hand rubbed walnut base
Today, there are more surviving examples of the Prelude so it’s safe to conclude it sold better than the Precedent. The Prelude was included in the Sears Roebuck Catalog for a few years beginning in 1964. This additional visibility and lower price point no doubt contributed to the Prelude’s relative success.