Watch List notes:

Cooch Behar, Prana Narayan (1633-65), Half-Rupee, Rupa Narayan (1695-1715), Half-Rupee, Upendra Narayan (1715-63), Half-Rupees (3), Devendra Narayan (1763-65), Half-Rupees (2), Rajendra Narayan (1771-73), Half-Rupee, Dharendra/ Harendra Narayan (1773-80/ 1783-1839), Half-Rupees (3), legends naming the respective ruler in each case (RB. 42, 62, 63, 64, 66, 68; Bose D-5, G-1, H-1, I-1, K-1, M-1; KM. 72, 109, 115, 121, 133, 141), generallyvery fine (11).
Ex. Nicholas Rhodes Collection

It is not possible to distinguish between the coins of Dharendra Narayan and Harendra Narayan as the first letter of their names is never visible on the coins.
Estimate: £120 - £150