Brt-582e. Wt = 12.75g. Diam = 18.8-22.4mm.
Photo from Bob Johnston who wrote: The 2 in the AH date is not clear but the final 1 is clear so it must be 1221. The date also makes sense since there is a 1201 RY 27 and 1211 RY 37. The square shape indicates it is a later EIC issue and not an earlier Aurangzeb issue. If Aurangzeb RY 47 it would be dated 1113 or 1114.