The first design in the Smithsonian collection by Retro 51 is the Corona twist-top rollerball pen. Its deeply etched barrel is reminiscent of the ornamental bronze-colored metal lattice that covers the outside of the National Museum of African American History and Culture building in Washington D.C Lead designer David Adjaye pays homage to the intricate ironwork crafted by enslaved African Americans in Louisiana, South Carolina, and elsewhere through the use of this design. The first design in the Smithsonian collection by Retro 51 is the Corona twist-top rollerball pen. Its deeply etched barrel is reminiscent of the ornamental bronze-colored metal lattice that covers the outside of the National Museum of African American History and Culture building in Washington D.C.