The three covers have plastic censorship tape, as expected. This first cover has a horizontal strip of four of the 50c value.
The second cover has a 5c Moreno, and three of the airmail issue (the 30c, 50c, and 1 peso). This is a rare combination on cover.
This third cover bears a 1 peso value and was addressed to the Baldwin Locomotive Works.
Notice the color difference of the two papers: the 1p is not clay, and the 5c is.
