Due to being fragile, few of these exist as far as I know. This is the only one I have ever seen. This looks to be a celluloid or catalin? Radio speaker that encompasses a standard type radio earphone reproducer of that era. Please look carefully at the picture and use the zoom tool. We held it up to the light so you can see how light can shine through it. There are a few cracks and tiny missing part in the “grill” design and edge and dust and/or a few stains or signs of age. The reproducer diaphragm plate looks to have some surface rust. We did connect it to a radio earphone jack and amazingly this still worked! Has nice cloth cord with 2 pin type plugs. I could not find any brand or part #s anywhere. Overall height approx 5. The item “VINTAGE 20s OLD BELL ANTIQUE MARBLED CELLULOID MINI RADIO HORN SPEAKER” is in sale since Friday, August 28, 2020. This item is in the category “Collectibles\Radio, Phonograph, TV, Phone\Radios\Tube Radios\1930-49″. The seller is “bigavsound” and is located in Owego, New York. This item can be shipped worldwide.