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<p>[QUOTE="Ian, post: 27246, member: 283"]What Roy said. <img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" /></p><p><br /></p><p>Of all the commemorative issues around. The ones I find particularly fascinating are the Austrian 25 euro `niobium' coins. They are bimetallics consisting of a silver outer ring with a niobium centre.</p><p><br /></p><p>The interesting thing about the metal `niobium' is that with the right electrochemical treatment it becomes coloured (no pigmentation added).</p><p><br /></p><p>There have been two issued so far (mintage limited to 50,000). The first was in 2003 and commemorated the 700th anniversary of the mint at Hall. The niobium centre had an irridescent gunmetal blue colouration to it. The second commemorated the railroads in Austria. The centre was irridescent green.</p><p><br /></p><p>The issue price for both was €45 and both have been complete sell-outs. The Hall mint commem. now changes hands for upwards of €150. The railroads one usually commands around €100 when you can find them. </p><p><br /></p><p>Here's the Hall one (if i can remember how to do this properly). Enjoy!</p><p><br /></p><p><img src="http://www.imb4u2.myby.co.uk/stuff/niobium.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><img src="http://www.imb4u2.myby.co.uk/stuff/niobium2.jpg" class="bbCodeImage wysiwygImage" alt="" unselectable="on" />[/QUOTE]</p><p><br /></p>
[QUOTE="Ian, post: 27246, member: 283"]What Roy said. :) Of all the commemorative issues around. The ones I find particularly fascinating are the Austrian 25 euro `niobium' coins. They are bimetallics consisting of a silver outer ring with a niobium centre. The interesting thing about the metal `niobium' is that with the right electrochemical treatment it becomes coloured (no pigmentation added). There have been two issued so far (mintage limited to 50,000). The first was in 2003 and commemorated the 700th anniversary of the mint at Hall. The niobium centre had an irridescent gunmetal blue colouration to it. The second commemorated the railroads in Austria. The centre was irridescent green. The issue price for both was €45 and both have been complete sell-outs. The Hall mint commem. now changes hands for upwards of €150. The railroads one usually commands around €100 when you can find them. Here's the Hall one (if i can remember how to do this properly). Enjoy! [IMG]http://www.imb4u2.myby.co.uk/stuff/niobium.jpg[/IMG] [IMG]http://www.imb4u2.myby.co.uk/stuff/niobium2.jpg[/IMG][/QUOTE]
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