Eli, koras like almost all Nepalese weapons come in many subtle and not so subtle variations. The type you're showing is very typical of an early style (mid 17thc...early 18thc) with a brass or gold design of chevrons and usually circular shapes. The crescent moon and a sun are also common themes. The grip would also reflect some of the design. This straighter blade is also found in both Tibetan and Bhutanese koras, but yours are Nepali. The curve and shape seems to reflect not only age but determine type as a pure fighting weapon or one of ceremonial nature.
