There are two years engraved into the wall (1959 and 1975). A third complete date lies to the left of 1975 (November 11th, 1982).
The official name of the Vietnam Wall in Washington, D.C. is the "Vietnam Veterans Memorial." It is also referred to as "the Wall." The figures of the servicemen by the Wall are called "The Three Servicemen." The memorial is different than most war memorials. It is not a memorial to the war but is a memorial to all who served in Vietnam, both dead and those still living.
They built their own Vietnam Veterans Memorial Wall.
The website, Vietnam Veterans Memorial Wall gives that information.
The wall.
More than likely, many veterans are in wheelchairs, confirm with their website: Vietnam Veterans Memorial Wall.
The site: Vietnam Veterans Memorial Wall; information column will answer that question.
Haya Taya Tow, designer, Vietnam Veterans Memorial Wall
Maya Ying Lin
If your uncle was in the US Military (civilians are not listed on the wall); obtain documentation and contact the Vietnam Veterans Memorial Wall office.
The Vietnam Veterans Memorial Wall website has a complete glossary for those terms/symbols.
Ask this question to the organization that you would get the object from; the Vietnam Veterans Memorial Wall.
See website: Vietnam Veterans Memorial Wall