Amr, this coin is not part of a series, it is a single release.
I attended the release at the Campbell barracks in Perth,
the home of the S.A.S. Only 10,000 coins where minted.
2500 for members of the S.A.S. and honoured guests and
7500 for general public.
The coin's reverse depicts SAS soldiers in action in a variety of
operational contexts. The design, which includes coloured
elements and the words AUSTRALIAN SAS 1957-2007, also
portrays the SAS badge.
The coin's obverse depicts Ian Rank-Broadley's effigy of Her
Majesty Queen Elizabeth II and the monetary denomination.
Silver Content...........................1troy ounce.
Monetary denomination ...........$1
Fineness (%purity)...................99.9
Minimum gross weight..............31.135g
Maximum diameter...................40.60mm
Maximum thickness..................4.00mm
Minted at The Perth Mint.