Marks on Ancient Coinage

1. Barry, Kevin. Counterfeits and Counterfeiters: The Ancient World
   http://www.ancient-times.com/newsletters/n13/n13.html

2. Marotta, Michael E. Genuine Counterfeit Ancients
   http://www.coin-newbies.com/articles/genuine_counterfeits.pdf

3. Hopkins, Edward C. D. Overstrikes & Countermarks
   http://www.parthia.com/parthia_overstrikes.htm

4. Baker, Richard. The Countermarks Found on Ancient Roman Coins: A Brief Introduction
   http://mjconnor.home.mindspring.com/accla/baker2.html

5. UNRV.com Roman Coin Denominations
   http://www.unrv.com/economy/roman-coin-denominations.php

6. O'Hara, Robert J. Ancient Greek Coins of Miletus: History, Metals, and Weight Standards
   http://rjohara.net/coins/history/

7. Scale and Weight of Greek Coins
   http://www2.ocn.ne.jp/~greekart/coin/coinsc1e.html

8. Unusual Roman Republican Coins
   http://www.ancientcoins.biz/pages/urc/

9. Examples from the Richard Baker Collection of Roman Countermarks
   http://www.ancientcoins.biz/countermarks/

10. Museum of Countermarks on Roman Coins
    http://www.romancoins.info/Countermarks-start.html

11. Calgary Coin. Grading & Quality Of Ancient Coins
    http://www.calgarycoin.com/reference/grading/damage.htm

12. Preliminary Information on Countermarks
    http://www.ancientcoins.biz/pages/ctmk/

13. About the Coin [of Tomis]
    http://www.geocities.com/romaniancoins/antice/anexehtml/abouttomis2.html

14. Thrace and Moesia
    http://dougsmith.ancients.info/thrace2.html

15. VIMINACIUM
    http://www2.arnes.si/~sspbmate/VIMINACIUM.htm