GIBRALTAR 1938-51 1s black and green, SG127aGibraltar 1938 51 1s black and green, perforations 13, upper right corner block of 4 with sheet number '48', SG127a. A fine and fresh unmounted mint positional block with full original gum. Minor marginal blemishes (creasing and perforation separation), but still a fine quality block. A very scarce stamp in this positional form. An attractive King George VI pictorial issue featuring Southport Gate, which is part of what was once a series of walls and