Macau, Banco Nacional Ultramarino, 5patacas, 'colour trial', 1968, black serial numbers, black, green and multicoloured, Carneiro at bottom right, ship seal at left, coat of arms at bottom centre, value at four corners, red 'Specimen' overprinted, reverse black and pink, maiden watching ships,(Pick 49ct) PMG 66 EPQ Gem Uncirculated, not often offered, scarce