Bronze and Stained Glass Lamp with Musicians

I have little information on this lamp, other than it belonged to my father before he passed away.

My best guess is that it may be German in origin and made of bronze. The details on the faces of the musicians are quite lovely. The shade is stained glass with a rosette metal trim that appears to be soldered. The center base of the lamp is somewhat similar to a musicians harp. One musician is playing the accordion the other a cello/base.

Any information about the lamp would be very welcome.