A rubbing of a Mạc Dynasty at Cao Bằng (莫氏) cash coin made by the Singaporean author and numismatist Dr. R. Allan Barker.
Rubbing by Dr. R. Allan Barker.
<ul><li><a rel="nofollow" class="external text" href="http://vietnam.allanbarker.com/d10_mac_caobang.htm">Coins of the Mạc at Cao Bằng - 莫氏 - The Mạc at Cao Bằng - 莫氏 - 1592 - 1677 AD</a> (<a rel="nofollow" class="external text" href="http://coins.allanbarker.com/">Dr. R. Allan Barker</a>).</li></ul>