The 2p1L5z and 2p1L6 "wobble" blue plate variety

 The late stage blue plate of the two pesos began to wobble during the 1955 rust brown printing, and then wobbled a whole lot more during the much larger and varied 1956-57 printings on the 1L6 paper. I only have one specimen of the 2p1L5z with wobble.

All other specimens I have are on the 1L6 paper. The wobble is usually in the vertical direction.

It can look like a double printing when the wobble is slight.

Sometimes the wobble is left to right, but I only find this on two specimens. These wobbles are so slight that they look like double prints or ov over-inking. I lean towards the latter.