Macau, Banco Nacional Ultramarino, 10patacas, ''colour trial', 1968, black serial numbers, green, turquoise and multicoloured, Carneiro at bottom right, watermark at left, coat of arms at bottom centre, value at four corners, red 'Specimen' overprinted, reverse green and pink, maiden watching ships and ship seal of the bank of left,(Pick 50ct) PMG 67 EPQ Superb Gem Uncirculated, seldom offered and in fantastic condition, rare