1c purple, 2c brown, 5c orange, 7c purple brown, 10c turquoise, 20c black & orange, 25c black & yellow green, 50c blue & rose, 1p light blue & red, 2p black & brown and 3p deep blue & orange 'Waterlow' issue all perforated COLOUR TRIALS in unissued colours in mint blocks of four. Some light tone spots but a scarce set. (As SG 153/163)