unused Block Larger Than four Tenth and Eleventh Printings, Aug. 1950 and June 1951: Grey and pale orange-yellow, 10th. printing block of ten [6-7, 18-19, 30-31, 42-43, 54-55]; 11th. printing block of sixteen and an upper right corner block of four forming a reconstructed block of twenty [9-12, 21-24, 33-36, 45-48, 57-60]. Fine and fresh mint