This is a 2 Mohar silver coin minted for Nepal during the reign of King Tribhuvana Bir Bikram Shah (1911–1950). Nepalese coinage from 1889 onward is dated according to the Bikram Samvat (VS) era. To convert the VS year to the Western calendar (AD), one must subtract 57 years (e.g., VS 1970 = 1913 AD).
