[Mexico via New York and OMC], 1866 folded cover from Mexico, via NY Steamship, to San Francisco, Mexico 1864 Eagle issue ½ real gray, type V (#20d) and 2 real orange (#23) tied by Franco Mexico 1 May 1866 postmark, entered US mails with "N.Y. Steamship 18 May" (10c due) entry, MEPSI cert

ex Rosenthal and Walske (Image)