Registered cover sent from PUERTO BERMEJO (Chaco) to Buenos Aires on 1/NO/1914 franked 37c. with Plowman stamps with M.M. overprint, VF quality! (Image)

Registered cover sent from PUERTO CONCORDIA to Buenos Aires on 2/NO/1914 franked 32c. with Plowman stamps with M.M. overprint, VF quality! (Image)

Registered cover sent from SAN PEDRO to Buenos Aires on 15/FE/1915 franked 22c. with Plowman stamps with M.M. overprint, VF quality! (Image)

Registered cover sent from FARO COMODORO RIVADAVIA (Chubut) to Buenos Aires on 20/OC/1917 franked with 22c. combining 17c. in department stamps (Plowman stamps with M.M. overprint) + 5c. San Martin definitive stamp, VF quality, very rare! (Image)

Cover sent from FARO COMODORO RIVADAVIA (Chubut) to Buenos Aires on 27/OC/1917 franked with 22c. in Plowman stamps with M.M. overprint, cancelled by blue datestamp of the lighthouse, also each stamp with "192" mark inside diamond, VF and rare! (Image)

Registered cover sent from Faro Punta Médanos to Buenos Aires on 15/MAY/1941 with spectacular POSTAGE COMBINING department stamps (25x 1c. Sarmiento with M.M. overprint) + official stamps (5c. Moreno + 10c. Rivadavia), all cancelled in General Madariaga, excellent! (Image)