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The knife is likely made of horn.
To my eye the handles look like a repair job - reattached or re-welded after breaking off, using either the original or replacement handles.
I've seen Youtube videos about the making of these, though not by this specific maker. Very intense work, not factory but artisan-made; main body...
Travelling watch repair? Jewelry repair? The fold-down panel looks like it was intended to provide a workspace for something fairly small and...
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