The following metallurgical trial piece is believed to have been struck in 1999. It uses the Martha Washington design first used in 1965 on J2101/P2081, J2116/P2082 and J2134/P2083 struck on a regular cupro-nickel clad planchet but with an intermittently reeded edge - 5 or 6 reeds per block - as shown below.
It is believed that this intermitent reeding was an attempt to help the blind differentiate this from the quarter dollar.
The Martha Washington design has become the U.S. Mint's all-purpose design for testing new compositions and planchet sizes both inside the Mint and outside by companies contracted by the Mint including IDX Inc, PMX Industries and Olin Brass Corporation. Because of this, it is not known if the piece above was struck inside or outside the Mint.
Martha Washington dollars on the Sacagawea dollar planchets are also known with this intermittent reeding. For more on this, click here.
Photo courtesy of Mike Byers.