5c Blue envelope issue of 1890 surcharged in black with “CORREOS NACIONALES / Seis Centavos / 1895” 
plus the national Emblem at center flanked with numeral “6”.
Earliest reported use: January 29, 1896.

ADDRESSED TO GUATEMALA                        20 FEBRUARY, 1896
Early use of 6c Single Domestic Rate Provisional Envelope.
Backstamped Guatemala the following day.

GUATEMALA CITY to SWITZERLAND        1898, DECEMBER 30
6c Provisional envelope uprated with 1886 10c Emblen for registration
fee.  Backstamped  ST. GALLEN / 24/1/99.

SANARATE to GUATEMALA CITY                            1896, APRIL 11
Backstamped RECIBIDA / GUATEMALA  / APR 18 1896 / 6 P.M.

GUATEMALA CITY to SAN JOSE                  1896, SEPTEMBER 21
With AMBULANTE No. 1 / GUATEMALA Y ESCUINTLA postmark.

GUATEMALA CITY to GUALAN                              1896, MARCH 2
6c Provisional Envelope uprated to 18c with 1886 10c Emblem 
and 1895 1c on 5c x 2, one on verso for Triple Domestic Rate. 
Backstamped with sawtooth  RECIBIDA / GUALAN / 5 MAR 1896 cds.
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SAN FELIPE to GUATEMALA CITY                                             1898
With AGENCIA POSTAL AMBULANTE / ENTRE CHAMPERICO
Y SN. FELIPE undated oval postmark. SAN FELIPE / 8 MAY 
sawtooth transit cds on the side. June 1 arrival cds on verso.

RARE AMBULANTE MARKING