The NEP barrel marking indicates British-Indian issue or sale to Nepal as a 'Native State', Nepal being a nominally sovereign entity not directly governed by the British, established under the Treaty of Segauli of 1816 following the Anglo-Nepalese War, with Shah Kings and hereditary Rana Prime Ministers dependent on the British for Western arms acquisition. The Nepalese unit markings on the trigger guard and faint stock inscriptions indicate regimental assignment, likely to one of the named battalions such as Gorakhnath or Purano Gorakh ('Old Gurkha') units.
First entering British service in 1871, replacing the Snider-Enfield, Martini-Henry variants served throughout the British Empire for 47 years. This example represents the significant military aid relationship between British India and Nepal during the late Victorian colonial period.