The mintage of 20 Cent Pieces dropped precipitously in 1876, from 1.3 Million to less than 15,000. On top of that, the majority of all the coins struck were from San Francisco, with an “honorarium” from Carson City. The need for this denomination in the East, i. e. anywhere Philadelphia was responsible for distribution, was virtually nil. (More comments on this found below if you wish to read them) Any Philly 20 Cent Piece is scarce, the 1876 even more so of the two dates issued, and the likely reason for survival of ANY is due to public hoarding, for one of two reasons. First, the Mint stopped making them, so the public hoarded them on the assumption they would be rare, and therefore worth money. The second and more important was that the celebration of the Centennial of American Independence in 1876 caused many coins of the year to be saved as remembrances of the event, which coincidentally enough was help in Philadelphia. This is an attractive if slightly darker toned AU example, showing the lightly Semi Prooflike surfaces that seem to come on this date a lot, simply as with less than 15,000 struck, the dies never wore out. Whether this is fully original is hard to tell; while the surfaces do suggest the probability of a very light cleaning, if so it must have been a long time ago. I would think that the grading services would consider this original enough, and that seems to be the currently accepted standard for most people. Either way, a decent example.

Historical Footnotes: The original excuse used to create this denomination in the first place was to make it easier to make small change in the Western states. The real reason was to find an additional use for some of the Silver pouring out of the Comstock Load, the result of the “Crime of 1873”. This subject would take a book on its own to explain - coincidentally enough, someone has written just that although the citation escapes me for now. WikiPedia has a page on this as well if you are interested.