EXTREMELY FINE GEM. ONE OF THE RAREST GRILLED ISSUE BLOCKS AND PROBABLY THE LAST 1868 15-CENT E GRILL BLOCK TO SURVIVE IN THIS SUPERB CONDITION.
Our records contain only three other unused blocks of four, and no larger multiples. One if these is reperforated at right (ex Lilly). The Zoellner block of four was broken into singles after the sale, as have most multiples containing stamps with decent centering.
With 2001 P.F. certificate