The 1794 half dollar in copper. These are believed to be true die trials, ie, struck in copper to test the die and not coins struck for collectors.
Examples of J17 are known for the following dies:
Overton-101 Struck on a cut down planchet which was overstruck as a 1795 half cent of Breen 6, Cohen 6. We are calling it P23A. To view this piece, click here.
Overton-102 Struck on a cut down planchet which was overstruck as a 1795 half cent of Breen 6a, Cohen 6a. We are calling it P23B. See Goldberg's 9/10 sale of the Davy half cent errors.
Overton-104 P23. The only example known was cut down and used as a half cent planchet - 1795 Breen 6, Cohen 6 per Pollock.
Overton-105 P24. 2 examples of Cohen 6a are known both cut down and used as half cent planchets. One is ex Samuel Jillette (circa 1957), Walter Breen Collection (3/4/1968), Jon Hanson (3/4/1968), Donald G. Partrick-Heritage 4/21 and the other is a recent discovery and was offered in ANR's 6/04 sale. To learn more about this piece, click here.
Overton-106 P24A. An example, cut down and used to strike a 1795 Breen 6a, Cohen 6a half cent was discovered in New Hampshire in July 2006 and offered in ANR's September 2006 to McGuigan-Heritage 8/22. To learn more about this piece, click here.
Overton-109 P25. 2 examples are known including the illustrated piece above from the Smithsonian Instriution. Click on the thumbnail image to see an enlargement. Pollock incorrectly lists this as being Overton 108 and having a plain edge, but it, in fact, it is an O-109 and still retains its lettered edge.
The second example of Overton 109, in much finer condition was discovered in July 2004 in the Kunsthistorisches Museum in Vienna Austria. It was the gift of S. Schwarz, 1920, inventory #175172 and weighs 11.181 grams and is illustrated below.
It is the third example of a 1794 half dollar die trial discovered between 2003 and 2004.
Electrotype copies in copper of 1794 half dollars exist including the Parmelee, Byron Reed example now in the Durham Museum.
Photos of both courtesy of the National Numismatic Collection of the Smithsonian Institution.