New Zealand 1d scarlet roughly 12 (not 13 as usually stated) fine mint

1d. scarlet block of four in which due to a corner fold occurring during printing the right margin was imperforate so the selvedge was cut off and the part perforate stamp was hand-perforated roughly 12 (not 13 as usually stated for the variety) fine mint. (Naturally creased) Very Rare. RPSNZ Certificate (2021). CP L2d(T) Cat 9000 dollars (approx 4750 pounds)