1915-S Panama-Pacific Exposition. MS-66 (PCGS).Lightly toned in speckled olive-gold patina, and then again mostly on the obverse, this smooth and inviting Gem exhibits pleasing satin luster throughout. This popular and scarce type was issued in connection with the Panama-Pacific International Exposition that was staged in San Francisco in 1915 to celebrate the completion of the Panama Canal, one of the greatest engineering feats of the era. All of the Panama-Pacific coins -- which range from 50 cents to 50 dollars (five different varieties in all) -- were struck at the San Francisco Mint, which was easily within walking distance of the fairgrounds. Most certified Panama-Pacific half dollars are in the MS-63 to MS-65 grade range. Premium Gem MS-66 examples, as here, are in the minority among certified coins.
