decide what we're going to do with it!
Learn to play it!
The Hohner pokerwork is a good and popular instrument - a robust and respectable melodeon from the cheaper end of the range, an excellent model to learn on and good enough to keep.

Each row will play a scale in a different key following a push-pull sequence the same as a harmonica. The outer and inner row will most likely be in D and G, but C/F, G/C and other pairs keys a fourth apart are possible. Alternatively they will be a semitone apart e.g. B/C but that's rare on a Hohner pokerwork.

We Brits call it a melodeon: most of the rest on the world calls it a diatonic button accordion.

Strictly speaking a bisonoric diatonic to distingush it from a Russian Garmoshka which is diatonic but unisonoric.
(I'll get me anorak...)