What Jose has astutely noted, the anomaly in the curvature of the blade on the example #3 is most interesting, and I had not noticed it. It does seem to have the appearance of a scarf weld. I have seen this on blades and honestly could not understand the viability of such repair, would the blade still have its effective integrity?
I have also heard of straight blades being worked into curved, but this seems a lot of work.
The blade on this paluaor seems to have the typical radius of a shamshir blade and overall character. Could it have been bent and straightened? Not sure whether scarf weld or straightened, but some repair at center of blade seems evident.
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