“U.S. MAIL”. All brass. Lever. Post key. “U.S. MAIL” is stamped on the obverse o
“U.S. MAIL”. All brass. Lever. Post key. “U.S. MAIL” is stamped on the obverse of the body. The reverse of the case is plain. “ANDREWS PERTH AMBOY N.J.” is stamped on the obverse of the shackle. “PATENT DEC 1840 1856” is stamped on the reverse of the shackle.