Lot 10121 – 10pa on 2 1/2pi violet, mint and mint nh block of twenty-four, all with inverted wmk

10pa on 2 1/2pi violet, mint and mint nh block of twenty-four, all with inverted wmk, from pos. 146-149/156-159/166-169/176-179/186-189, position 168 shows weak “2 1/2” and damaged frame at lower-right corner, fresh, very fine and an extremely scarce compound perforation block.