Macau, Banco Nacional Ultramarino, 50patacas, 'colour trial', 1958, black serial numbers, green, red and multicoloured, Camoes at bottom right, watermark at left, coat of arms at bottom centre, value at four corners, red 'Specimen' overprinted, reverse red, maiden watching ships and ship seal of the bank of left,(Pick 47ct) PMG 66 EPQ Gem Uncirculated, seldom offered and in fantastic condition, rare