New Zealand 1915 set of 15 in PLATE BLOCKS of FOUR VERY RARE

1915-30 set perf 14 x 13.5 except the 1/- which is perf 14 x 14.5. upper left corner blocks of 4 with plate number. The blocks are mounted in the margins but the stamps remain Un-mounted apart from the 5d block where 1 of the stamps is mounted re-enforcing the perfs at top right. A wonderful and Extremely Valuable Set