cover 1899-1900, Military Postal Station Balance, three soldier's letters to US comprising no. U1 with no. 213 tied by Jul 20 1900 Zamboanga duplex cancels, stampless with Oct 10 1899 Manila duplex cancel (Goodale A-4) with 2c postage due on arrival, & no. U8 with Dec 1 1899 Jolo duplex cancel (Goodale A-1), few flaws, fine-very fine