Type I: 15c Dark Blue Without Security Printing on the Inside


Triple Impression Error on the Embossed Imprint at Right Back Flap

ONLY KNOWN 

1902, DECEMBER 7: BUENOS AIRES to CANEAL, CRETE
Backstamped January 6, 1903.

15c Envelope over paying by 3c the 12c single outbound rate.
The 15c single outbound rate became effective in 1903
Type II: 15c Dark Blue With Security Printing on the Inside
Design Inscribed "REPUBLICA ARGENTINA / CORREOS Y TELEGRAFOS"


1903, DECEMBER 26: BUENOS AIRES to GERMANY
15c Single outbound rate envelope. Backstamped REGENSBURG, February 28, 1904.