The Wisconsin quarter is the 30th in the 50 State Quarters Program. On May 29, 1848, Wisconsin became the 30th state to be admitted into the Union. The Wisconsin design depicts an agricultural theme, featuring the head a cow, a round of cheese, and an ear of corn. The design also bears an inscription of the State motto, "Forward."

Wisconsin adopted the State motto, "Forward," in 1851, reflecting the state's continuous drive to be a national leader. Wisconsin produces more than 15 percent of the Nation's milk and more than 350 varieties, types and styles of award–winning of cheeses. Wisconsin is also a major corn producer. State corn production contributed $882.4 million to the Wisconsin economy in 2003.

Characteristics
The obverse (heads) design features the familiar image of George Washington by John Flanagan, used on the quarter since 1932.

The reverse (tails) design features an agricultural theme which features the head of a cow, a round of cheese and an ear of corn.

“The American Innovation $1 Coin for the State of Wisconsin celebrates the world-class invention of the Cray-1 supercomputer, which was designed and built in the state of Wisconsin and is often associated with the beginning of the modern era of supercomputing,” said Paul Hollis, Director of the Mint. “The Mint is honored to highlight this groundbreaking innovation and recognize its importance to both Wisconsin and the United States.”

“Here in Wisconsin, we have a proud history of leading advancements in technology, industry, infrastructure—you name it—and I'm thrilled that the Wisconsin Innovation $1 Coin celebrates one of our proudest home-grown innovations, the Cray-1 supercomputer, which was known as the world's fastest computer at the time of its creation," said Wisconsin Governor Tony Evers. “Seymour Cray, the Wisconsinite and innovator behind the Cray-1 supercomputer, represents the best of our state, and his work has shaped countless aspects of the modern world that we know today. We're incredibly proud to recognize the Cray-1 supercomputer as an icon of Wisconsin's capacity for innovation."

Rpm as well, the coin is a 36 D

The Richard M. Nixon Presidential $1 Coin honors the 37th President of the United States.

Richard Milhous Nixon was born January 9, 1913, in Yorba Linda, California, and raised in nearby Whittier. He attended Whittier College and Duke University Law School, and then went on to practice law. During World War II, he served as a lieutenant commander in the U.S. Navy.

Once the war ended, Nixon successfully ran for Congress in 1946, where he gained national attention for his role in the investigation of charges against former State Department official Alger Hiss. In 1950, he won a seat in the U.S. Senate, serving until 1952, when he was elected vice president.

Nixon campaigned for the presidency in 1960 but lost by less than 120,000 votes or 0.2 percent of the popular vote. A subsequent bid for governor in 1962 also ended in defeat. In 1968 Nixon campaigned for president again and won. He served until 1974, when he resigned to avoid impeachment for his role in the Watergate scandal. He is the only president to resign the office.

The 2010 Yosemite National Park Quarter is the third coin in the America the Beautiful Quarters® Program.

Yosemite National Park, one of the first wilderness parks in the United States, is best known for its waterfalls, but within its nearly 1,200 square miles are deep valleys, grand meadows and ancient giant sequoias. It was first established as a national site on October 1, 1890 (26 Stat. 650).

Characteristics
The obverse (heads) design features the familiar image of George Washington by John Flanagan, used on the quarter since 1932. It has been restored to bring out subtle details and the beauty of the original.

The reverse (tails) image depicts the iconic El Capitan, which rises more than 3,000 feet above the valley floor and is the largest monolith of granite in the world. Design candidates were developed in consultation with representatives of Yosemite National Park.

https://www.so-calleddollar.com/scd/california-gold-discovery-centennial/
California Gold Discovery Centennial

1948 · HK-497
Reference HK-497
Date 1948
Metal Bronze
Diameter 40 mm

Obverse depicts a miner panning for gold in Coloma, California with Sutter’s Mill in the background, the location where gold was discovered in California in 1848. Reverse is a variation of the California State Seal.

MINNESOTA STATEHOOD CENTENNIAL
1958
https://www.so-calleddollars.com/Events/Minnesota_Statehood_Centennial.html

Released on April 4, 2005, this is the 32nd coin released in the 50 State Quarters Program and the second released in 2005. Minnesota, admitted into the Union on May 11, 1858, themed the coin, Land of 10,000 Lakes. It highlights an image of a tree-lined lake with two people fishing, a loon on the water, and a textured outline of the state surrounding its nickname, Land of 10,000 Lakes.

Characteristics
The obverse (heads) design features the familiar image of George Washington by John Flanagan, used on the quarter since 1932.

The reverse (tails) design features two people fishing on a lake, a loon, and a textured outline of the State surrounding its nickname, "Land of 10,000 Lakes."