1929/30: Registered envelope from "Quito 7.XII.29" to Germany franked with 1 ½ s. grey grey blue plus 1 s. registration stamp and National postage sent via Guayaquil (9.12) and Barranuilla (11.12.) backstamped "Frankfurt 31.12.29" (envelope with archive punching holes) together with second envelope from Ambato (12.9.1930) to Berlin, franked with Scadta 75 c. green plus National postage sent via "Guayaquil 13.IX.30" and with additonal Canal Zone franking tied by Cristobal duplex and 'jusqu'à' cachet in violet, then by ship mail to Germany, fine and scarce commercial usages. (Image 1) (Image 2) (Image)