This is a Hohner Pokerwork HA-2815 Heligon diatonic button box accordion with 2 rows of buttons, 21 treble keys, and 8 bass keys. It was made in Germany.
It is in very nice condition with only a couple of small cosmetic blemishes that I'll try showing in pictures. The sound is full and very beautiful.
This appears as well cared for throughout the years. I was told that it was on display in a glass cabinet by family members of the previous owner. There's a few spots on eges that have some tarnish or marks.
Please refer to pictures for the best description.
Antique and vintage items are sold As-Is as collectibles with no guarantees or warranties implied.