San Martin combined use

Here is a link to a few covers with the previous definitive issue (San Martin), which was only possible between october 1, 1935 and the end of that year. The San Martin stamps were subsequently demonetized and the post office allowed their exchange for the new issue during the first 90 days of 1936.


A page with selected San Martin combined used covers

This cover seems to be from October 1, 1935, which would make it a first day of use for the 5c Moreno.