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<p>[QUOTE=&quot;Ian, post: 151170, member: 283&quot;]Firstly, the pounds. YYou will find that these were struck as follows:</p><p><br /></p><p>1. Common circulation strike (Nickel Brass)</p><p>2. Brilliant Uncirculated (Nickel Brass)</p><p>3. Proof&nbsp; (Nickel Brass)</p><p>4. Silver Proof (Silver) - half the thickness of the ordinary brass slug.</p><p>5. Silver Piedfort Proof (Silver) - same thickness as the brass slug.</p><p><br /></p><p>The silver piedfort proof for 1983 is the key to the piedfort series and is becoming harder to find. What you have falls into to one of the five categories above. </p><p><br /></p><p>Secondly the 1970 Hong Kong dollar is CuNi (copper nickel) and was minted at the Heaton mint in Birmingham, UK.[/QUOTE]</p><p><br /></p>

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