Genuine gold coins of the Sūrī kings are exceedingly rare. The rupees are fine broad pieces (Pl. X, 3); the obverse follows the style of Humāyūn’s silver; the reverse bears the Sultan’s name in a square or circular area, along with the date and the legend, “_May God perpetuate his kingdom_,” and below the area the Sultan’s name in Hindī, often very faulty.[60] In the margin are inscribed the special titles of the Sultan, and sometimes the mint. On a large number of both silver and copper coins no mint name occurs; some of these seem to be really mintless, the dies of others were too large for the coin discs. On a very common mintless silver type of Islām Shāh (1545-53) and Muḥammad ’Ādil Shāh, the Arabic figures 477 occur in the margin: the significance of these is unknown. A few silver coins of Sher Shāh and Islām Shāh are square; half-rupees are extremely scarce; a one-sixteenth piece is also known. [60] If the area is circular the Hindī inscription appears in the margin. The majority of copper coins bear on the obverse the inscription, “_In the time of the commander of the faithful, the protector of the religion of the Requiter_”; on the reverse appear the Sultan’s name and titles and the mint (Pl. X, 4). These inscriptions are sometimes contained within square areas. During the years 1552-56 two nephews and a cousin of Sher Shāh, Muḥammad ’Ādil, Sikandar and Ibrāhīm, contested the throne and struck both copper and silver. Coins of the two last are very rare (Pl. X, 5).