The 2 pesos value was printed with the first batch of clay papers and saw postal use in late 1943 and early 1944 and on dark colors identical to the colors being used at the time on the 2P1E3 of the early 1940s, and was then printed on the late clay paper in the 1950s with light colors that are identical to a printing on the 2p1L1 or 2p1L2 (I still have not completely separated some of the 1L papers). The early clay, the 2PCL1, is a very rare stamp on and off cover, and the late clay, the 2PCL2, is uncommon, but nowhere near as rare as it's "dark colors" counterpart.
Here are three 2PCL1s (probably all that I have!)
Here are three 2PCL2s from the mid 1950s. This plate got an acid was. I estimate this happened in 1952.
Here is a post in this blog about the acid wash to the 50c and 2 pesos plates.
