Source: A 1931 dictionary
Jire buṭṭā (जिरे बुट्टा); Fluted ornamentation (e.g. that on the silver of a khukri sheath).1
Jire means of or like cumin-seed.
Cumin-seed like openwork on the scabbard moutpiece of a khukurī.
Compared to actual cumin seeds, right.
1. Sir Ralph Lilley Turner; A comparative and etymological dictionary of the Nepali language. London: K. Paul, Trench, Trubner, 1931.