This First Day Cover features the 8-cent U.S. stamp issued September 12, 1971, to mark the 450th anniversary of San Juan, Puerto Rico. The cover bears the official first-day postmark from San Juan, PR, and includes a distinctive cachet showing a globe encircled by envelopes beneath the words “FIRST DAY COVER.”
The stamp commemorates the founding of San Juan in 1521, making it the oldest continuously inhabited European-established capital city under U.S. jurisdiction. Its design depicts the iconic sentry box (garita) of Castillo San Felipe del Morro, the 16th-century fortress that guarded the harbor for centuries.
A notable detail is the vertical inscription “SAN JUAN, PUERTO RICO” along the left edge of the stamp, paired with the dates 1521-1971. The clean, unaddressed cover remains in excellent condition, preserving both the crisp postmark and the attractive two-color cachet.
An appealing addition for collectors of U.S. territorial issues, Puerto Rican postal history, or anniversary commemoratives, this 1971 FDC offers strong display value and solid philatelic interest.
