hi marc,
glad you stepped in

. this is a good beginning, and i hope we can push it further, past one persons opinion.
as a start - hobsons anology -
PESHCUBZ, s. A form of dagger, the blade of which has a straight thick back, while the edge curves inwardly from a broad base to a very sharp point. Pers. pesh-kabz, ‘fore-grip.’ The handle is usually made of shirmahi, ‘the white bone (tooth?) of a large cetacean’; probably morse-tooth, which is repeatedly mentioned in the early English trade with Persia as an article much in demand (e.g. see Sainsbury, ii. 65, 159, 204, 305; iii. 89, 162, 268, 287, &c.). [The peshkubz appears several times in Mr. Egerton’s Catalogue of Indian Arms, and one is illustrated, Pl. xv. No. 760.]
1767.—
“Received for sundry jewels, &c. … (Rs.) 7326 0 0
Ditto for knife, or peshcubz (misprinted pesheolz) 3500 0 0.”
Lord Clive’s Accounts, in Long, 497.