Embossed metal picture
This is an odd thing I found in an antique/stuff store today. It looks old... anyone have any idea when this might date from? Or what kind of metal it is? It is quite heavy.
What really baffles me though is that it has a small shaft sticking out of it (my close-up photo didn't turn out but I can post one if needed - it's directly up from the big sailboat in the sky) on which something was obviously originally threaded. What on earth might this have originally been? I thought of a clock, but it has no numbers and the shaft isn't centred. Or a music box? I suppose if I take off the back (leather, nailed on) I might find out, but I'm a bit reluctant to disturb it. (Actually, looking at the picture... the shaft is below what is just a disassociated wing alongside two full birds, so it might have been a mechanical or at least 3D bird).
The only thing I do know is that the caption is in German (AUF REISEN) and it means "on travels" or "on vacation." depending on how you translate. Other than that, I'd appreciate some help!