A collection of a 10-inch obverse galvano, a 10-inch reverse galvano and a 14-inch reverse plaster designed by Howard Weinman for the Long Island Tercentenary U.S. Commemorative Half Dollar surfaced in 2024. These were previously unknown to the numismatic community. Howard Weinman passed away in 1976 and these remained in his family's personal collection until they were sold privately in 2024. This obverse galvano features the adopted design and has been antique silver plated. It depicts a male Dutch settler and an Algonquian Indian. This galvano was produced by Medallic Art Co. in 1936 as notated on back of the original wood frame. Accompanied with the galvanos and plaster are two full page newspaper articles in the Brooklyn Daily Eagle and the Long Island Sunday Press from April 1936. These articles feature photographs of Howard Weinman sculpting in his studio and completing the plasters for the obverse and reverse of the Long Island Half Dollar Commemorative. Also included are two original sepia tone photographs of Howard Weinman at his home in Colchester, VT (circa 1935) sculpting his plasters for his U.S. Half Dollar. One features him outside near the ocean and the other depicts him in his studio. Howard Weinman was the son of Adolph Weinman, who designed the U.S. Walking Liberty Half Dollar and the U.S. Mercury Dime. A plaster with Howard Weinman's first design of the obverse is featured on page 187 of Don Taxay's book An Illustrated History of US Commemorative Coinage. This early design depicts "IN GOD WE TRUST" instead of "E PLURIBUS UNUM" which is what appears on the obverse of the adopted design. Taxay lists 142 silver commems, 85 plasters, but NO galvanos as they are extremely rare in private hands. In The Encyclopedia of United States Silver & Gold Commemorative Coins by Anthony Swiatek and Walter Breen, there are also NO galvanos referenced. Regarding this Long Island Half Dollar Commemorative, they mention that after being approved by the Federal Commission of Fine Arts, the models were sent to Medallic Art Company. Then, before the Philadelphia Mint struck 100,000 coins, John R. Sinnock, Engraver of the Mint, added "IN GOD WE TRUST" below the ship. According to USPatterns.com and other Commemorative experts, there are only 6 known galvanos for U.S. coins in private hands: Judd 1512 Reverse Galvano for the 1877 Eagle 1913 Bronze Galvano Reverse of the Buffalo Nickel 1916 MacNeil Quarter Dollar Obverse Galvano 1916 MacNeil Quarter Dollar Reverse Galvano 1936 Obverse Galvano Long Island Half Dollar 1936 Reverse Galvano Long Island Half Dollar Both the obverse and reverse galvanos were produced by Medallic Art Co. During the 20th century, the Medallic Art Co. produced galvanos for James Earle Fraser, Laura Gardin Fraser, Victor D. Brenner, Howard Weinman, and many others