The coin in question is an exquisite piece from the Colorado Gold series, minted in Philadelphia in the year 1861. As a $20 denomination coin, it is crafted from gold, symbolizing its value not just as currency but also as a collectible. The absence of a mint mark indicates that it was produced without a distinguishing mark specific to certain branches of the mint. Despite lacking specific measurements for width, height, diameter, and weight, the coin remains a prestigious item within numismatic circles, particularly because of its historical significance and the era in which it was struck. The mintage is noted as zero, which may indicate a rarity or a potential discrepancy in documentation, potentially adding to its allure. It's important to note that this coin does not list a designer or specific edge type, which is not uncommon for some older coins. As a part of American coinage history, this 1861 $20 gold coin stands as a testament to the craftsmanship and economic context of its time. Given its series and unique properties, this coin holds considerable value for collectors and historians alike, often sought after for its aesthetic appeal and historical significance within the United States' monetary evolution.