$50 patterns from 1877 are among the most valuable and desirable patterns ever issued by the United States Mint. There are unique $50 1877's struck in gold of both the Large Head and Small Head. USPatterns.com estimates less than a dozen known of both the Large Head and Small Head struck in copper, some gilted.
This Large Head $50 is in choice proof condition and was certified as a PR 63, CAC. It is incredible that such a rare and large pattern from 1877 has survived for so long.