Info at:
http://en.wikipedia.org/wiki/Sher_Shah_SuriObverseKalima-e-tayyabah (
lā ilāha illā-llāh muhammadan rasūlu-llāh), enclosed in a square.
The margins should have the names of the four successors:
Abu Bakr below,
Umar at the left,
Uthman above, and
Ali at the right.
ReverseInside square (top):
es-sultan Sher Shah khallad Allah mulkahu (the Sultan Sher Shah, may Allah perpetuate his kingdom)
Inside square (bottom): Devanagari legend "Sri Sersahi" (often very faulty, as on this coin).
The margins should have
farid ed-dunya wa as-din abu al-muzaffar zarb Gwalior (Unique one of the world and of the faith, father of the vioctorious, minting of Gwalior.)
Mint mark of Gwalior
Year: 951 AH (1544 AD)

PS: The word
Rūpaya (Rupee) was first used by Sher Shah Suri.