Illustrating various denominations reflecting postal rates in effect, the diverse paper types, 
colors and sizes. The highlights are: the double PROVISIONAL overprint on the 1888 
“CONTAD. MYOR”  issue; the only known 11c and 5c Composite Proof of the 1890 Allegory 
and 20c  albino imprint error. On usage,   the very scarce 1887 First Issue privately printed 
to order 11c + 11c Double   Outbound Rate envelope; a 10c Allegory addressed to China 
and the  1893 General Ezeta  New Year Greeting Card issue.

1887 FIRST ISSUE
1888 "CONTAD. MYOR" ISSUE
1889 VOLCANO ISSUE

The 1890 - 1898 "Seebeck" Issues

1890 ALLEGORY OF EL SALVADOR
1891 VOLCANO ISSUE
1892 COLUMBUS ISSUE
1893 GENERAL EZETA ISSUE
1894 GODDESS OF  VICTORY ISSUE
1895 COAT OF ARMS ISSUE
1896 PICTORIAL ISSUE
1897 PICTORIAL ISSUE
1898 CENTRAL AMERICAN UNION ISSUE