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<p>[QUOTE=&quot;Aidan Work, post: 157613, member: 1824&quot;]These coins are very difficult to study,unless you can read Arabic,that is.My knowledge of Arabic is limited to being able to read the numbers,as you need this knowledge to be able to convert an AH date into an AD date,which is to take off 3% &amp; add 621 to it.The 3% is to take into account that an AH year is only 354 days long instead of 365 or 366 days long in the AD year.</p><p><br /></p><p>Aidan.[/QUOTE]</p><p><br /></p>

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