The "dot after R of MAR" plate variety is relatively common. I was unable to find other plate varieties related to the "POZO DE PETROLEO EN EL MAR" legend that are listed in Klass and Kneitschel, and yet neither catalog lists this common variety. I list the type of each stamp shown. Quick links: the issues ( 1E / NGR / NOP / 2 / CL / late issues ( 1L1 / 1L2 / 1L3 / 1L4 / 1L5 ) ) plate varieties: major flaws near the 50 numerals / break at top of V of CENTAVOS / dot after R of MAR / doubled or smudged inner design / major lower edge design shifts / upper edge major inner design breaks / upper left outer corner break / lower outer line breaks

50c1L4