PUERTO RICO #U14 5 CENTS ENTIRE USED "MAYAGUEZ TO HOLLAND"

Description

Slit open on both sides and bottom.  Front and back held together securely by flap sealed to back.
Front includes "Via New York" pen script instructions at top left.  Clearly dated back stamps for San Juan (Dec 8, 1901), New York (Dec 15, 1901) and Amsterdam (Dec 26, 1901).
Tiny U14 pencil notation on back as well.