Is this an opium cutter ?

[fernando]

The seller in the street market assures me this is an opium cutter. I suggested it is a bettel cutter and he says it is not the same thing; that he saw it in the internet as being a tool for cutting opium ... which i doubt.
Anyone here to tell me the seller is right ... or wrong ? In fact and based on his 'certainty' he is asking a lot of money for this antique.
Its real size is circa 1/3 of this enlarged picture


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