Rare1931 PAN AM ( Lineas Aereas Panagra) Venezuelan Aero Postal Charge Pamphlet

A real find here for the Pan Am collectors ! This small fold out postal charges pamphlet ...Tarifa Aeropostal.... is in Spanish of course...measures 6 3/4' x 4 3/4'...and is dated as October 1931. Pan American Airways was formed in October of 1927 so this piece of memorabilia is only 4 years later.