20 CENTAVOS RED

1873, APRIL 17: GUATEMALA to SAN FRANCISCO
20c Red for double outbound rate effective January 1872.
Arrival datestamp on the side, charged "20" cents for internal delivery.

1872, MAY 2: SALAMA to SHEFFIELD, ENGLAND
Pair of 20c tied with "24" oval of dots cancel. Boxed in SALAMA 
prephilatelic cancel on the side Circulated via PANAMA through the French Post 
with ASPINWALL / PAQ. FR. A No. 1 marking.
British accountacy marking of FR/2F20c overstriking SALAMA postmark.

ONLY KNOWN FIRST ISSUE COVER TO EUROPE 
CIRCULATED THROUGH THE FRENCH POST

1872, JANUARY 5: SALAMA to SHEFFIELD, ENGLAND
Two pairs of 20c and a single tied with "24" oval of dots cancel,
routed via COLON (Panama), January 25.
Charged 3/ by British Post in Panama.

LARGEST KNOWN FRANKING FOR THE ISSUE

1872, MARCH 4: GUATEMALA to SHEFFIELD, ENGLAND
Pair of 20c with 10c with "1" oval of dots cancel. Routed via COLON, 
backstamped upon arrival. Charged 2/ by British Post in Panama.

The single outbound rate effective January 1872 was 20c.
Therefore, this letter overpaid by 10c the 40c double outbound rate