Re: Lyon Healy
Dec 8 1914 is a C G Conn patent date. Lyon and Healy had a number of Stencil horns under their name. Yours was more than likely made by Conn.
Cann made their stencils using parts from previous models not their current run of instruments. So the stencil was always considered a secondary/less up to date model. This way the Stencils were never competing with the name brands current up to date made. Horns in the 1920 were mass produced and everybody had to have one in their parlor. The Excitement of the day, before radio and it did not require a record player.
With that in mind, there are a lot of these primitive keyed odd named instruments out there.
They are fun to have refurbished, but little to no value. We repair guys like to gobble them up for nothing and use them for parts to repair the more up top date models.