KNOCK Doorbells has a wonderful selection of restored vintage door chimes for sale. They also offer restoration services. So, if you have an old doorbell that you love, they can make it like new.My personal favorite is this Nutone doorbell/clock combination from the mid- 1950s.
This one is new old stock and still has the original box.This doorbell is like the one in our house. This one has been painted black, which looks a lot better than the original wood finish that ours has.
Here are a few others that I would prefer to have. The one with the treble clef was designed by Russel Wright.
In addition to restored vintage doorbells, they also sell brand new modern door chimes. These door chimes would look as good in a mid-century home as they would in a contemporary one. They come in teak, zebrawood, and walnut.