TEN CENTAVOS
Only one printing. In black on thick paper. Produced by repeating five times 
one engraved strip to complete the pane of 25 stamps.

PRINTING CHARACTERISTICS

Type 1: Dropped numeral "1".
Type 2: Top and side panels with special background.
Type 3: Space between "L"  of  "UNIVERSAL" and "R" of "SALVADOR" very wide.
Type 4: Left top panel with special background.
Type 5: Raised "V" in "CENTAVOS".

ONLY RECORDED PANE KNOWN TO EXIST

1883 SAN SALVADOR to BARRANQUILLA, COLUMBIA
   Type 2 of 10c x 2 with 1c and 5c issues for 26c proper single outbound registered rate
tied with negative star cancels alongside December 22 cds.

Via Panama. Struck with black pre-philatelic oval cancel with manuscript
"Received from the British Agency on January 2nd."

ONLY KNOWN PANAMA PRE-PHILATELIC CANCEL USED
ON EL SALVADOR MAIL DURING THE PHILATELIC PERIOD

1879 SAN SALVADOR to NEW YORK
10c (Type 1) for single outbound rate to North America, posted June 27.

1882 LA LIBERTAD to BORDEAUX, FRANCE *
10c (Type 5) and 1c with "PARA" maritime cancels alongside August 8 cds.
Endorsed "CITY OF PANAMA". Backstamped Bordeaux, September 6.

1883 ACAJUTLA to PARIS, FRANCE
10c x 6 (in order, Types 4, 5, 2, 3, 5, 4) with 1c and 5c issues on wrapper,
proper 66c multiple outbound rate via Panama, all tied with
purple negative star cancels alongside July 6 cds.

LARGEST RECORDED USAGE OF 10c ISSUE

1886 SAN SALVADOR to AHUACHAPAN *
10c Diagonal bisect to produce 5c single interior rate tied with December 7 cds.

ONE OF ONLY TWO RECORDED 10c BISECTS ON COVER

1885 STA ANA to PARIS, FRANCE*
10c x 2 (Types 4 and 5) with 1c and 5c issues for proper 25c single outbound 
registered rate. Postmarked July 10. Received Paris, August 14.

* Certified by organizations recognized by the FIP.