PUERTO RICO-MARTINIQUE: 1867, Entire letter franked with strip of 3 France Napoléon perforated 20 centimes blue, tied by anchor mark with adjacent octagonal "ST. JEAN. DE. PORTO-RICO 21 MAI 67" to Martinique, sent via "ST. THOMAS PAQ. FR. E No.1 / 30 MAI 67". The franking applied with horizontal crease and some short perfs; a very scarce inter-Antilles letter
