AE bronze   cr crude   MM mint missing
AR silver   DM date missing   ND no date
AV gold   ds double struck   NI nickel
BI billon   EL electrum   NM no mint
ch choice   lt light   nr near(ly)
c/m countermarked   t/m testmarks(s)   mr mount removed
References Used
A   Album, Stephen, A Checklist of Islamic Coins
Balog   Balog, Paul, The Coinage of the Ayyubids
Bop   Bopearachchi, O. & Pieper, W., Ancient Indian Coins
Bruce   Bruce, Colin, Unusual World Coins
Cr   Cribb, Joseph, A Catalog of Sycee in the British Museum
G   Göbl, Robert, Sasanian Numismatics
H   Hartill, David, Cast Chinese Coins
Hsu   Hsu, T.K., Illustrated Catalog of Chinese Coins
KM   Krause-Mishler, Standard Catalog of World Coins
M   Mitchiner, Michael, Oriental Coins, the Ancient and Classical World
Nercessian   Nercessian, Y.T., Armenian Coins and Their Values
RIC   Carson, Kent & Barnett, Roman Imperial Coinage
Y   Yeoman, Current Coins of the World
Z   Zachary, Michael, The Ten Cash Commentary: The General Issue Ten Cash Coins of the Republic of China