I bought one just like this a few months ago. It sucks and it blows

What exactly am I looking at ?

Is this an old harmonica?

The detail and composition really brings out this image.
Great take!

The top of the harmonica stands out well, although It would help a lot to be able to see the holes a bit better--a simple piece of white paper in the foreground could have taken care of that.

The composition is problematic, because the very narrow object is surrounded by two relatively large, bland, empty, mainly textureless areas. I think that putting the harmonica in a different context (e.g., in a child's hand, on a dressing table, on top of some sheet music) would have enhance this image.

For me, good try, but a near miss.

Lovely detail, but I wish I knew what it was.