Is it true there are unofficial two-headed strikes of the 1879 Morgan silver dollar?

Unofficial is almost an understatement. John Pinches Ltd. in England produced transfer die two-headed 1879 silver dollars in copper and copper-nickel in an ill-fated effort toobtain a contract to strike U.S. coins commercially. Several examples later entered the coin collecting market through the 1947 auction of the John Harvey Pinches estate.

To read the complete article, see:
Reopened â€˜O' Mint made proof dollars(http://www.numismaticnews.net/article/reopened-o-mint-made-proof-dollars)

Two-Headed 1879 Morgan Dollars

In or around the year 1879 the firm of John Pinches, Ltd., of England, desired to obtain a contract to strike United States coins on a commercial basis. Sample 1879-datedMorgan dollars were made up, consisting of two-headed coins. Apparently, Pinches had a very advanced technology for making transfer dies from existing coins, for the few knownspecimens struck from these dies are all very well struck and for all intents and purposes are as fine as the Philadelphia product. Strikings exist in copper and copper-nickelmetals.

Glendining's London Sale of the John Harvey Pinches estate, July 29, 1947 offered examples. Also see Stanislaw Herstal Sale (Bowers and Ruddy); Glendining Sale of Nov ember18, 1987, Lot 109; Superior's Auction '88, Lot 237. The 1987 Glendining Sale offered two obverse dies and other items fitted into a case. (Information courtesy ofMichael]. Hodder.)

To read the complete article, see:
Silver Dollars & Trade Dollars of the United States - A Complete Encyclopedia(https://www.pcgs.com/books/silver-dollars/Chapter15Listings-023.aspx)