National Museum of American History

This 51-1/2" wooden T-square has a scalloped top piece attached to the handle by 6 brass screws. A hole at the end of the handle is for hanging the instrument. It has no markings, but paint and ink stains on the handle indicate it was heavily used.

National Museum of American History Pictures: View Photos & Images of National Museum of American History

Five Facts about the Smithsonian's African American Museum of History and Culture - New Orleans Museum of Art

17 Awesome Things to See at the National Museum of American History - TRIPS TIPS and TEES

The sad & sorry Smithsonian

National Museum of American History

Historians and History Museums: Offsite Sessions at the Smithsonian's National Museum of American History, Perspectives on History

Smithsonian National Museum of American History

David Adjaye on the National Museum of African American History and Culture

National Museum of African American History and Culture (NMAAHC)

National Museum of American History - Washingtonian

Smithsonian National Museum of American History - Cinnabar

National Museum of American History

American History Museum in Washington DC