Overprinted  in two lines and in two different type size with
“CORREOS NACIONALES / SERVICIO INTERIOR”.

GUATEMALA CITY CIRCULATING                              1931, JUNE 24
“CORREOS NACIONALES” measuring 88.5 mm x 4 mm.
“SERVICIO INTERIOR” measuring 37 mm x 2.5 mm.

GUATEMALA CITY CIRCULATING                    1929, DECEMBER 3
With SERVICIO DE ENCUMIENDAS cds on the side.
“CORREOS NACIONALES”  in italics measuring 76 mm x 4 mm.
“SERVICIO INTERIOR” measuring 52 mm x 2.5 mm.

GUATEMALA CITY CIRCULATING                    1931, FEBRUARY 2
With SERVICIO DE FARDOS POSTALES / ADUANA DE GUATEMALA 
and POSTAL LOCAL postmarks.
“CORREOS NACIONALES” measuring 78 mm x 4 mm.
“SERVICIO INTERIOR” measuring 49 mm x 3 mm.