It would be interesting to measure the perfs on the block. These were line perfed stamps.After 1906 perf.15 is less than 10%. After 1905-06 perf.16 decreased to 0.5%.After 1905-06 Rogue perfs. are found on 5%,1907 onwards less than 1%.
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Posted 05/06/2018 4:06 pm
