Open Friday through Tuesday,
10:00 a.m. – 5:30 p.m.
(Closed Wednesdays & Thursdays until further notice, & closed December 25. Policies and requirements are subject to change without notice.)
Admission is always free!
2 Massachusetts Ave., N.E.
Washington, DC 20002
This stamps is a secondary source because it was issued in 1940; later than the period being studied.
This stamp was issued in 1994, making it a secondary source too.
Is this a primary or secondary source? Explain.