In the June issue of “The Cadenza” it notes that EN Guckert, of Toledo, Ohio is the owner of the Union Music Co, “ a concern which manufacturers the ‘Duplex” banjos and publishes chord books for stringed instruments.

 

Guckert wrote and published a chord book in 1919 and 2 years later this was followed by a tenor-banjo chord method, but it is doubtful when he actually manufactured instruments.

 

Duplex

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Do you have a banjo by this maker?  can you supply us some images?