FDC produced for the 3c stamp issued in honor of Puerto Rico, issued on November 25, 1937, in San Juan, Puerto Rico (Sc. 801). Green & red cachet produced by Fidelity, featuring a view of a guard tower at La Fortaleza. This cover bears a block of 4 stamps. Includes a smaller unserviced (but addressed) envelope produced for Sc. 802, the 1937 Virgin Islands stamp. Listed as No. P-4 in Planty's Photo Encyclopedia of Cacheted FDCs. Neatly typed addressed. Open back flap. Key Words: Spanish - Hispanic - Caribbean - US Possessions - Puerto Rico - San Juan.