i'd been scanning old Bear catalogues & couldn't find this.
That small cutout on bellyside of handle-window is unusual.
I was wondering if perhaps a Bingham like this "Basic" model:
or maybesomething like a Herters Perfection Turkish Hunter perhaps as a U-finish too.
(but i think their U-finish bows had the mustard coloured Farbenglas on the back &
yours seems to be all black .... has it been refinished?)