Here are two uncommon insulators from Mexico -- actual postage additional

CD 133.5 TEL. FED. / MEX // JM -- MLOD -- beautiful teal green -- great condition! Just a tiny wire rub and small bruise inside at the base of the pin-hole (I'd rate VNM) -- $250 (SOLD)

CD 133.1 TEL. FED. / MEX // SAMUEL Hnos / NEW YORK -- this is a fat one - very close to a CD 133.3! Just a couple small pings -- $80 (SOLD)