Accidental collector - old weapons ID assistance (Yao?)

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I obviously always thought these NWF, Assam, Burma maybe surrounding regions...

That being Due to there details of manufacture... the only discrepancy being the exposed partial tang, that is historically usually European..

But personally ill accept Malawi etc. for these... as 3 out of 4 are provenanced to separate donors, all of whom only donated items from that region...

Unless or Until someone proves there from the Yao in Burma or some Indian manufacture etc.

Indian manufacture in Africa could make more sense to me?

But until that time I have to go with available apparently provenaced pieces originally from 3 separate collections, unless some one can dig up another pre.ww2 reference or reliable provenance to prove the BM have got 3 accessions incorrectly listed to donors or they are made by Indian smiths in Africa, etc.etc.

When I look at other African Yao stuff I see no similarity... Strangely the Lao Dao from Burma looks closer.

Who can find more evidence... there must be other old collections with these?

Fernando... Are there any Portuguese museum collections of relevance you can access?

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