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<p>[QUOTE=&quot;GSDykes, post: 2149366, member: 73321&quot;]gxseries:</p><p><br /></p><p>Again thanks for the link to the RM, I have been there before. Great stuff!!</p><p><br /></p><p>chrisild:</p><p>I cut in half many bi-metallic coins to ascertain their method of manufacture. I then connect that method with known patented processes. I began with the first modern bi-metallic (the 500 lire) and as shown above, I commented upon the method used in the 1991 Russian 10 Rouble. You may recall that in 1996 Canada had trouble with their very first bi-metallic, and Germany came to their rescue, with a fine striking method. Some are joined with plastic --&nbsp; flowing metal into grooves in the harder metal under striking pressure. Others have anti spin notches etc.. It is interesting, at least to me to observe and note the various engineering techniques used. I also collect bi-metallics which are the first year of certain countries. The only way to examine early bi-metallic construction, is to open one up! After cutting them in half, I polish the sections, and place the three parts into a 2x2, and the core, ring and joined sections are all visible. The 2x2&#039;s then join my bi-metallic collection. I am also member 578 (I think thats my number) of the Worldwide Bi-Metallics Collectors Club. WBCC.</p><p>GSDykes[/QUOTE]</p><p><br /></p>

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