Gibraltar SG123a 1 1/2d carmine perf 13.5 Plate 1A Cat 1200 pounds RARE

1938 1 1/2d carmine perf 13.5 Plate 1A block of four lightly hinged on top pair bottom Piar U/M. The two right stamps affected by gum crease otherwise fine. (The plate number example is fine U/M) SG 123a