Hohner Black Dot Double Ray melodeon for sale

I have a Hohner melodeon for sale. It's a Double-ray, also known as Black Dot. This is an excellent box, very good for sessions. I'm selling it because my true calling is D/G not B/C, and I hate to see it not being played. I'll consider reasonable offers.

The instrument's a B/C box, making it perfect for Irish traditional music. It also makes it a very versatile instrument, having all the chromatic notes available.

It's in great condition, has had two careful owners.

Inside, bass side:

Inside, treble side:

The instrument has a thumb-strap and two shoulder-straps. One of the straps is made by a different manufacturer, there must have been a mix-up somewhere in its life. But obviously this doesn't make any difference.

Since a number of versions of this instrument have been made, here is the layout of the chords: