Original Items: One-of-a-kind set. The final link in the Manhattan Project's far-flung network was the bomb research and development laboratory at Los Alamos, located in the mountains of northern New Mexico.  Codenamed "Project Y," the laboratory that designed and fabricated the first atomic bombs began to take shape in spring 1942 when James Conant suggested to Vannevar Bush that the Office of Scientific and Research Development and the Army form a committee to study bomb development. The Manhattan Project was a secret research and development undertaking during World War II that produced the first nuclear bombs. Nuclear physicist Robert Oppenheimer was the director of the Los Alamos Laboratory that designed the first bombs. The Manhattan Project grew to employ more than 130,000 people, and Los Alamos was just one over a dozen sites that contributed to the project. Los Alamos is a town in New Mexico, United States, that was the birthplace of the first atomic bomb. Because it was secret, Los Alamos was referred to different site names such as S-Site and Site Y.

Included in this set are the following items:

- Number 225 S-Site matched pair of Los Alamos, Manhattan Project, pin back brass badges. The S-Site Badges were an identification badge required to enter the secret S-Site, at Los Alamos. Two badges were issued to each person, they wore one and placed on board so there was a central location where the exact identify and number of people on site would be known at any given time. Typically, we only find one badge, having both, a matched set is extremely rare. The S-site was where most of the explosives were tested, and the badge was made of brass so that it could survive in an accidental explosion.

- Los Alamos identification badge numbered 215. This is a circular brass numbered disc that pre-dated the S site badge, these were worn around the wearer's neck while a matching tag was hung on the board. These were replaced quickly by S-Site marked pin back badges. This is the rarest and earliest of the Los Alamos identification and security badges.

- Bullion embroidered Manhattan project uniform should patch that measures; 2 5/8" H x 2 1/8" W.

This is a fantastic set of totally original and extremely rare WW2 badges and insignia from the S-Site of the Los Alamos Manhattan Project.

The Manhattan Project was a research and development undertaking during World War II that produced the first nuclear weapons. It was led by the United States with the support of the United Kingdom and Canada. From 1942 to 1946, the project was under the direction of Major General Leslie Groves of the U.S. Army Corps of Engineers. Nuclear physicist Robert Oppenheimer was the director of the Los Alamos Laboratory that designed the actual bombs. The Army component of the project was designated the Manhattan District; Manhattan gradually superseded the official codename, Development of Substitute Materials, for the entire project. Along the way, the project absorbed its earlier British counterpart, Tube Alloys. The Manhattan Project began modestly in 1939, but grew to employ more than 130,000 people and cost nearly US$2 billion (about $23 billion in 2018 dollars). Over 90% of the cost was for building factories and to produce fissile material, with less than 10% for development and production of the weapons. Research and production took place at more than 30 sites across the United States, the United Kingdom, and Canada.