4d Violet Perf OS blk of 4 plated as 2L23 - 2L24, 2L29 - 2L30 showing major varieties thick horiz bar to right 4' (2L24) (gum bends) & flaws under right value shield (2L30) (sl flts). It is very difficult to identify 2L24 in a single stamp. The variety 2L30 proves it. SG O73(var), ACSC 111A(2)h & i cat $1700 as 4 MUH singles. Varieties cat nearly 4 x normals so this blk should cat double $3400 or more. Rare multiple. (P)

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