Scott 592 (4).�1956 Cover from�Labanagan, Zamboanga del Sur to Chicago, USA. Stamps tied with�Labanagan�(22 September 1956) Circular Date Stamp, showing inverted Date in Centre. Additional Fancy�Karomatan, Lanao cancel applied in blue. Roughly opened on bottom and some flap staining just showing through to front. Scarce cancels compounded by the inverted cancellation error.