2.50p National Emblem issue of 1921 surcharged “UN PESO” in red.
Overprinted  in two lines and in two different type size with
“CORREOS NACIONALES / SERVICIO INTERIOR”.

GUATEMALA to SAN ANDRES OSUNA           1927, OCTOBER 29
“CORREOS NACIONALES” measuring 117 mm x 7 mm.
“SERVICIO INTERIOR” measuring 67 mm x 3 mm.

GUATEMALA CITY CIRCULATING                         1929, JANUARY 9
“CORREOS NACIONALES”  in italics measuring 76 mm x 4 mm.
“SERVICIO INTERIOR” measuring 52 mm x 2.5 mm.