Maybe someone who knows more on Nepal or the Khyber region swords and hilts might be able to help. I could also believe a Nepalese type hilt might be used in Darjeeling and areas east of Nepal. The guard is also like one we were shown on a Dha/Doa . I am going to speculate that these are from the east. On the map Nepal is a long way from the Khyber region.
This dha guard could be seen as similar or a derivative.