The following new Scott numbers have been released:

3874a (5¢) Sea Coast coil, serpentine die cut 10 vert., with small date

3904 37¢ Robert Penn Warren

3905 37¢ Yip Harburg

3906 37¢ American Scientists – Barbara McClintock

3907 37¢ American Scientists – Josiah Willard Gibbs

3908 37¢ American Scientists – John von Neumann

3909 37¢ American Scientists – Richard Feynman

a. Block or horiz. strip of 4, #3906-3909