24-karat gold 2016 half dollar will be struck in a half-ounce size to mark the centennial anniversary of the introduction of sculptor Adolph A. Weinman's Walking Liberty half dollar designs.

The 2016 Winged Liberty Head dime to be struck to mark the centennial of the coin's 1916 introduction into circulation in .900 fine silver will be produced as a tenth-ounce, 24-karat gold release. Shown are mock-up images for the coin.

The gold 2016 Standing Liberty quarter dollar is to feature sculptor Hermon A. MacNeil's original Bared Breast obverse from 1916, not the modified Mailed Breast subtype introduced in 1917.

The United States Mint has released image mock-ups for the 24-karat gold 2016 Winged Liberty Head dime, Standing Liberty quarter dollar and Walking Liberty half dollar to be issued as numismatic products marking the centennial anniversaries of all three coins.

The three coins were all introduced in 1916 into general circulation in .900 fine silver. Coin World's earlier coverage of the Mint's potential plans for 2016 for the centennial anniversaries can be found here.

The Citizens Coinage Advisory Committee was reviewing the mock-up designs June 17 including discussion of 2016 100th Anniversary Special Products.

The 1916 dime and half dollar were originally designed by sculptor Adolph A. Weinman and the 1916 quarter dollar by sculptor Hermon A. MacNeil.

The gold 2016 quarter dollar is to feature MacNeil's original Bared Breast obverse from 1916, not the modified Mailed Breast subtype introduced in 1917.

On all three coins, the fineness is shown in the mock-up images as 24K rather than the often used inscription ".9999 fine gold."

BLOG: Breaking down the gold 1916 centennial coins

The 2016 Winged Liberty Head dime is to be released as a tenth-ounce gold coin, the 2016 Standing Liberty quarter dollar as a quarter-ounce coin, and the 2016 Walking Liberty half dollar as a half-ounce gold coin.

On the 2016 Walking Liberty half dollar, the fineness and weight will be reflected on the reverse, beneath E PLURIBUS / UNUM as AU 24K / 1/10 OZ.

AU is the atomic symbol for gold in the Periodic Table.

For the 2016 Standing Liberty quarter dollar, the weight and fineness is reflected in the mock-up images as AU 24K / 1/4 OZ. in the framed area just below WE TRVST.

For the 2016 Walking Liberty half dollar, the weight and fineness is depicted in an arc on the reverse below the eagle and above HALF-DOLLAR as AU 24K 1/2 OZ.

The digits for the date 2016 appear to exhibit serifs, with the numerals for the dime appearing taller or stretched when compared with the quarter dollar or half dollar.

While U.S. Mint officials have not disclosed which production facility will strike each of the three 2016 gold coins and whether they will bear a Mint mark, the obverse of the 2016 Walking Liberty half dollar mock-up image shows the D Mint mark of the Denver Mint, which has not traditionally struck U.S. gold coins in recent years.

U.S. Mint officials have also not released any details on issue dates, mintage limits, final product options or surface finishes.