1939 Sy.D3Xz production flaw, the first issue 20h blue, smooth gum, vertical pair with production flaw - 2x vertical hair paper crease in paper; mint never hinged, interesting 1939 Sy.D5Xz production flaw, the first issue., 40h blue, block of four, L pair stamps with production flaw - 2x thin paper crease in paper; mint never hinged