1830' is a reference to number 1830 in 'A checklist of Islamic
coins' by Steven Album
, where the coins of the Artukids of Mardin are nos.1826-1847.Album
's 'Checklist' is a very useful guide to the coinages of the various dynasties, but is very condensed (over 250 dynasties in 150 pages) and totally unillustrated.
The better guide to the figural coinages are the two volumes by Spengler and Sayles
(the SS references), 'Turkoman Figural Bronze Coins and Their Iconography', Vol
.I - The Artukids and Vol
.II - The Zengids. These are well illustrated and also transcribe and transliterate all the legends.
The best online reference I have found to the Artukid coins is http://www.geocities.com/mehmeteti/
though there must be others (besides the three links he gives).
For the Zengids, see http://islamiccoins.ancients.info/Zangids/Zangids.htm
[Howard was quicker than me