Choice original example of this key to the Standing Liberty quarter series; the 1916 is also the first year of issue. Just 52,000 coins were struck and most were not saved. CAC approved for quality and eye appeal. CAC is a third party grading service that grades the grading services (PCGS & NGC) and only approves the best coins in holders. CAC coins have been bringing significant premiums at auctions as more and more collectors are demanding the sticker before they buy.