In 1907 Ecuador issued a set with the presidents of the country. This set was in the same year issued with overprints for the different provinces in Ecuador, all with different overprints reading 'Consejo Escolar', 'CE' or just '1907'. I have only one example in my collection:

There's more examples here:
http://zenius.kalnieciai.lt/america...07/1907.htmlScott, Michel and Yvert & Tellier refer to these issues but without being clear about their exact use. Apparently they were issued as part of a scheme to support a school reform that was effectuated in 1907.
I found two resources on the subject. Alas, one is in Slovak and one in Spanish none of which I speak:
http://www.postoveznamky.sk/postage...-e-from-1907http://guayaquilfilatelico.org/bibl...ander_53.pdfDoes anyone know more about the historical context of these issues? Or can anyone help to translate the information on the above sites?