10 CENTAVOS BLUE and BLUE GRAY

Blue, Imperforate Margin Block of 24


1873, FEBRUARY 26: GUATEMALA to NEW YORK
With 10c blue First Issue for Jan 1872 single rate 
to North America.

Blue Gray, Imperforate Margin Block of 35

Blue, Perforate Margin Block of 40

SECOND LARGEST BLOCK KNOWN

1983 MARCH 27: RATALULEU to GUATEMALA
10c Blue with "12' oval of dots cancel.

ONLY KNOWN USAGE ON INTERNAL MAIL