This is a Wilcox Gay Recordio. It's undated, unlabeled and like many others it's origin is somewhat in doubt. It has a metal-core, spins at 78 rpm with an outer-edge start and is 8-Inches in diameter. The recording showcases a solo pianist who breaks meter to bang out a few chords seemingly annoyed by what might have been a sound check.
Ode to an Annoyed Pianist
Despite being undamaged by age, the disc is in rough shape. When it was originally cut, the lathe was bumped and it cut snake-like arcs across many of the grooves. This makes it particularly difficult to get contiguous segments transferred to digital. I managed only about a one-minute segment I consider listenable which is posted above.