Later issues of the 50c 'Servicio Oficial'

The 12 mm (wider) overprint was last used between 1945 and 1948 on the two unwatermarked papers. Both are rare as officials, and very scarce used.

NGR



NOP



The later issues have the 11 mm (narrower) overprint.

1L1 'deep orange'



1L1, with master plate variety 'clipped upper outer left corner.'



2C, so-called Straight Rays watermark, with usual bright colors.



Clay paper from 1952, CL2B.



Zarate paper from 1955, 1L5.