Quote from: wayne88ny on Jan 29, 2018, 11:20AMAccording to trumpet-history.com
The Bohland & Fuchs line of cornet models was popular with American retailers from the 1880s until the start of World War One....
These cornets were marketed by major music and department stores, and even instrument makers. These resellers and their brands include:
· Sears and Robuck Marceau Paris
· Montgomery Wards Jules De Vere, Paris
· Lyon & Healy Henry Gunkel, Paris
· Carl Fischer Music House
· Vega (Vega Banjo prior to the acquisition of Standard)
· C. Bruno & Sons Henry Pourcell
· H.N. White Superior by M. Bauer
· H.N. White Superior Silver Star
· H.N. White Silver Star
· H.N. White Union
· H.N. White Imperial
· Imperial, Geo. Baring, Eng.
· Imperial, London, Eng.
· Champion, Silver Piston, Chicago
No doubt they were also making stencil trombones during this time period. Perhaps H.N. White copied the curved brace from a Bohland & Fuchs trombone.
I found this information also. I also read and can't find it now, that some of the King instruments has Bohland&Fuchs inspired designs. So the curve may be taken from B&F.