unused Block of Four Group B: Type O1 6a. pale ultramarine, Type O2 1a. red, and 4a. apple-green (a few split roulettes), and Group D 3a. (one with semi-circle and dot omitted variety) , each in a complete unused sheet of four, the last with a few light stains. S.G. O8cB, 10B, 11A, 29B/a