where is it produced?
Philadelphia mint, Carson City Mint, San Francisco Mint
Twenty-cent piece (United States coin)
The design for the twenty-cent piece was approved on April 12, 1875. It was, however, immediately revised to better define the olive leaves at the right end of the branch (over the "N" and the "T" in "cents"); on the original design, the leaves overlapped with each other. An amended approval was given on April 15. Production began at Philadelphia on May 19, on June 1 at the Carson City Mint in Jones's home state of Nevada, and between June 1 and 17 at the San Francisco Mint.
what is the twenty-cent piece? A coin struck from 1875 to 1878 who designed it? William Barber, Christian Gobrecht
wiki:6112141
Twenty-cent piece (United States coin) [SEP] Production, aftermath, and collecting
The design for the twenty-cent piece was approved on April 12, 1875. It was, however, immediately revised to better define the olive leaves at the right end of the branch (over the "N" and the "T" in "cents"); on the original design, the leaves overlapped with each other. An amended approval was given on April 15. Production began at Philadelphia on May 19, on June 1 at the Carson City Mint in Jones's home state of Nevada, and between June 1 and 17 at the San Francisco Mint. Only about 40,000 were struck at Philadelphia; the bulk was at the two Western mints with 133,290 minted at Carson City, and 1,155,000 at San Francisco.