First my congratulations everyone who has placed details here since this sword type is doubly difficult to analyze because of its apparent duality both in the Mediterranean and in the Indian Ocean.
The word Nimcha is Persian and used in the Baluch language also. I think that although it seems a short weapon this is only half the story since there are big swords around from the Moroccan side and those which were used by Band of London Officer Tobias Blose plus those seen a court in Morocco were examples from artwork. Thus what does it mean; Nimcha?
Nim means half not small. Nim o Nim means half n' half. Yak o Nim means half past One. Nimcha is likely to mean half sword....
or half sharpened sword.
In most cases Nimcha have a heavy back edge and a sharp cutting edge suggesting
that is the traditional style. A chopping slashing form; From Horseback or in its shorter style a cutlass.
Regards,
Ibrahiim al Balooshi.