1879 - 1899 POSTAL CARD ISSUES
1879 FORMULA CARDS
Forerunner of the
First Regular Postal Card Issue of 1882-1883.
Prepared following
El Salvador entry to the Universal Postal Union in April 1879.
Locally printed on white paper stock, measuring 138 x 91 mm.
Lilac blue on white, issued without face value.
UNLISTED and UNREPORTED
ONLY KNOWN
1879 SAN SALVADOR
to SWITZERLAND JULY 15
Yellow brown on
white card with 1c and 2c Volcano issues for
proper 3c Outbound
Postal Card Rate. Via London, August 13.
ONLY USED OF TWO
KNOWN
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