A challenge ... what would this be?

[fernando]

I have been at the seller again. He told me he has this thing for quite some time; doesn't even remember where or who he got it from.
He wants some money for it. Not much, but i consider it expensive; anyway, an amount i am not willing to pay.
I handled it again and noticed a certain detail; something new to add to the reasoning of what this device would be: the area between the 'forks' is not of square section, but fairly angular. I don't think this only esthetical, but instead 'sharpened' like that to serve a purpose.

Fernando
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