Printed 'Compania Constructora Richardson S.A. Los Angeles, California' incoming cover franked with 1914 5c grey green 'Transitorio' issue (SG CT4) and USA 1912 2c bright carmine (SG 407) both tied by LOS ANGELES machine cancel dated JUN 5 1914. Addressed to LA CANANEA, SONORA, MEXICO with arrival cds on reverse. An interesting & unusual cover with the USA 2c paying the internal US rate to the Mexican border and the Mexican 5c paying the internal rate within Mexico.