Experimental pieces - Struck from any convenient dies to test a new metal, new alloy or new denomination; those testing a new shape; those testing a standard metal for a new denomination; ...
EXPERIMENTAL PIECES
Pieces which are struck for the purpose of testing a new alloy, design feature, etc. See also Trial Piece.
EYE APPEAL ...
Experimental Pieces and Tokens
During the time of the American Revolution, a wide variety of experimental coins or tokens appeared. In this group, we find the so-called Continental dollars of 1776 struck in pewter, brass, and silver.
Experimental Pieces: Very similar process to "Die Trials", but with subtle differences. A coin minted with a die, official or not, to try a new metal, alloy, or shape.
Patterns and experimental pieces form one of the most interesting divisions of numismatics.
Experimental Pieces Generally elongated patterns or trial specimens. See also Test Roll for differences.
Extant Refers to a die that is still existing, or a die that is known never to have been destroyed.
Full Roll A thing of beauty! ...
Do not use as a generic term describing experimental pieces and trial pieces. pieces of eight Popular term for silver Spanish 8-real pieces; often associated with pirate treasure.
- (suffix to a J-number) assigned by Judd Adams and Woodin, A-W, AW - published in 1913 and then the second edition in 1959, United States, Pattern, Trial, and Experimental Pieces. In its time, the most accurate and complete cataloguing of U.S.
Following the limited coinage of two varieties of experimental pieces, with periods before and after the legends on the reverse, business strikes of the 1907-1908 issue were produced for circulation.
patterns and experimental pieces; artists' models for medals and coins; bronze, silver (Figure 17), and gold Greek coins, such as the 15-stater gold piece of King Eucratides of Bactria; the earliest Greek coin, ...
Essay
Also called an essai, the term represents experimental pieces, pattern coins, transitional and trial pieces.
Newman suspects a few of the unusual coins in the hoard coins were produced in Philadelphia as experimental pieces, these include the 1734 halfpenny cast in lead, the 1737 pewter cast hafpenny and the two 1738 pewter cast halfpence.
 See also: Revers, Struck, Reverse, Coin, Obverse
  
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