Stack's 1/1992:571 - Stack's 11/1994:873 - American Numismatic Rarities 7/2005:1146, not sold
J.J. Teaparty, sold privately in 3/1985 - Jules Reiver Collection - Heritage 1/2006:22503, $18,400 - Stack’s 1/2009:397, $20,700
Alpine Coins, sold privately in 8/1977 - Bayside New York Collection - Heritage 7/2008:389, $6,325
Michael Summers, sold privately in 1/2004 - Westmoreland County Collection - Heritage 1/2008:2844, $25,300
The O-123 1795 Half Dollar is the second or third rarest die variety of the year (a lot depends on whether the O-118 actually exists). Estimates of the surviving population range from nine to twelve examples. In his Spring 2015 listing, Steve Herrman shows 11 appearance of O-123 and O-123a, though there are some duplcations there.
O-123 is rare because of the early failure of the reverse die which quickly cracked through the final S of STATES through OF, eventually leading to a chunk of the die falling off, rendering it useless (Heritage 1/2008:1339 shos this massive failure).
Most examples of the 1795 O-123 variety are low grade or impaired. There is one standout, however -- an NGC MS65 that last appeared on the market in 2005.
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