This is a First Day of Issue cover from June 14, 1956, featuring The Alamo the "Cradle of Texas Liberty" cachet.
A 1956 U.S. First Day Cover (FDC) featuring a plate block of four 9¢ "The Alamo" stamps (Scott #1043). It was officially postmarked on June 14, 1956, in San Antonio, Texas.
Cachet Producer: Fluegel Covers, a producer highly regarded by collectors for their striking, vivid multi-color designs.
Stamp Series: Part of the patriotic Liberty Series issued by the United States Postal Service to honor vital historical landmarks and guardians of freedom.
Unique Feature: It bears an upper-right corner plate block of four stamps showing the plate number 25393. Corner plate blocks on First Day Covers are generally more desirable to philatelists than single-stamp covers.

Features:

• First Day of Issue Stamp Cache Envelope
• USA

Condition: Pre-Owned Good. Brown staining along the diagonal edges of the top envelope's flap. Common in older envelopes where the original gum (adhesive) has oxidized and reacted with the paper's fibers over time.