Opened on 10 March, 1900
MIL. STA. VIGAN / PHIL. ISLES.
Worn Out Cirular Duplex in Black

Earliest Known Usage:
10 March, 1900

VIGAN to SAN FRANCISCO                       14 MARCH, 1900
Backstamped SAN FRANCISCO / CAL / APR 14.
VIGAN / ILOCOS SUR, P.I.
Steel Circular Duplex in Black

Period of Use:
13 Setpember, 1900 to 4 February, 1902

VIGAN to MANILA                              4 FEBRUARY, 1902
Proper 1c rate per 1/2 ounce weight.

LATEST REPORTED USAGE
R / No. __ / VIGAN
Boxed-in 
Registration Control Marking
in Violet

Recorded to exist in red.

VIGAN to SWITZERLAND  30 JANUARY, 1902
Registered letter properly franked with 13c Single Registry Rate (5c + 8c). 
Backstamped RECEIVED / MANILA, P.I. / FEB 3 and ST. GALEN / 12.III.02.