10 Centavos Indian Head
In Salmon, With Black "PROVISIONAL" Overprint

Deep Salmon on White Laid Paper, Deep Curved Flap
Error: Without "PROVISIONAL" Overprint
Size: 144 mm x 80 mm
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1887 NOVEMBER 28: SANTA TECLA to LEIPZIG
10c Salmon on laid paper with added 1c Volcano.
Via NEW YORK, December 23.
Size: 143 mm x 85 mm.
Type I: Deep Curved Flap, Pink Inside

1888 APRIL 20: LA LIBERTAD to HAMBURG
10c Salmon Indian Head uprated with 10c Volcano for 22c double outbound rate (short paid by 2c). 
Backstamped NEW YORK, May 3 and HAMBURG, May 26.
Size: 140 mm x 80 mm
Variety: Pointed End Flap

1887 NOVEMBER 9: SAN MIGUEL to SAN SALVADOR
10c Salmon on white wove paper for double local rate.
"BANCO INTERNATIONAL DEL SALVADOR" embossed on back flap.
Size: 145 mm x 88 mm.