[Old1625]

Our friend edison64 gets my vote.

Often the casting shown was just an intermediate part of the whole reproducer horn. The tone arm to which the soundbox was fitted had a gradual taper, and in turn fed into a piveting joint at the platter level the underside of which in turn was fitted the casting offered in the query posting. Woodwork extended the horn out further to a larger terminal aperture, one usually adorned with decorative louvres, grilles, latticework, etc, and sometimes appointed with shutter mechanisms and other odd shaped movable devices believed to alter volume and tonal response.

Shown is a pic of a typical intermediate horn casting shown in application in one of my Victor record machines--the whole sound amplification schematic being readily visible--from where soundbox is attached to where the sound comes out--with the turntable mechanism assembly removed.... Does the casting look somewhat familiar...?