After the
Islamic conquest of
Byzantine Syria ( that is modern
Syria, parts of Southern
Turkey, Lebanon, Jordan and
Israel )
during the years 634-641
Byzantine coins kept circulating for quite a while,
but after about 658 supply of petty coinage from
Byzantium seems to have been cut and local imitations, the so called
Pseudo-Byzantine coins where struck in
Syria.
These copy the
byzantine coins but inscriptions,
mintmarks etc. are mostly blundered and meaningless.
This is the
type of coins your specimen belongs to.
The second step in
Arab-Byzantine coinage was made from about 670 with the so called "Umayyad Imperial Image coins"
These show Byzantine-style images and meaningful legends in Greek and / or Arabic and mostly bear a
mint name.
They have been struck for about 20 years and come from at least 10 different mints.
After about 690 the so called Standing caliph coins formed step 3 but they do not really look very
Byzantine anymore.
If you are interested in more details, I truely recommend to you a book recently published by Tony
Goodwin,
one of the most knowledgeable scholars of
Arab-Byzantine coinage.
http://www.amazon.com/gp/product/1874780757/ref=sr_11_1/002-4948799-7663211?ie=UTF8Kind regards
byzantiumcoins