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<p>[QUOTE=&quot;physics-fan3.14, post: 3190073, member: 19165&quot;]The google says your weight was probably made to weigh Portuguese coins, and probably made in the early 1700&#039;s (between 1706 and 1750). There is no way to tell exactly what year yours was made. There is another variety with an obverse portrait that says 1747, so they were probably made sometime around then. </p><p><br /></p><p>It appears that these are fairly common (I&#039;m guessing most banks and merchant houses would have had a set). They were used to verify that the coins were of proper weight (when a coin&#039;s value was based on the weight of precious metal it contained). </p><p><br /></p><p>It appears the value is somewhere in the $75 range. </p><p><br /></p><p>Here are some links to read more: </p><p><br /></p><p><a href="https://coinquest.com/cgi-bin/cq/coins.pl?coin=15790" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://coinquest.com/cgi-bin/cq/coins.pl?coin=15790" rel="nofollow">https://coinquest.com/cgi-bin/cq/coins.pl?coin=15790</a></p><p><a href="https://www.vcoins.com/en/stores/pavlos_s_pavlou_numismatist/131/product/great_britainae3_pound_12_coin_weight_for_portuguese_gold_coin_1747signed_by_kirk/383097/Default.aspx" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.vcoins.com/en/stores/pavlos_s_pavlou_numismatist/131/product/great_britainae3_pound_12_coin_weight_for_portuguese_gold_coin_1747signed_by_kirk/383097/Default.aspx" rel="nofollow">https://www.vcoins.com/en/stores/pavlos_s_pavlou_numismatist/131/product/great_britainae3_pound_12_coin_weight_for_portuguese_gold_coin_1747signed_by_kirk/383097/Default.aspx</a></p><p><a href="https://www.cointalk.com/threads/1747-three-pound-twelve.60893/" class="internalLink ProxyLink" data-proxy-href="https://www.cointalk.com/threads/1747-three-pound-twelve.60893/">https://www.cointalk.com/threads/1747-three-pound-twelve.60893/</a></p><p><a href="https://www.britnumsoc.org/publications/Digital%20BNJ/pdfs/1909_BNJ_6_14.pdf" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.britnumsoc.org/publications/Digital%20BNJ/pdfs/1909_BNJ_6_14.pdf" rel="nofollow">https://www.britnumsoc.org/publications/Digital BNJ/pdfs/1909_BNJ_6_14.pdf</a>[/QUOTE]</p><p><br /></p>

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