FINE AND RARE. A DESIRABLE ORIGINAL-GUM BLOCK OF FOUR OF THE 1870 NATIONAL BANK NOTE ISSUE, COMBINING TWO STAMPS WITH AN OBVIOUS GRILL AND TWO STAMPS COMPLETELY LACKING A GRILL.
It has been surmised that sometimes more than one sheet was fed into the grilling machine at a time, resulting in weak or missing grill points. The grill on the right stamps is centered to the far right and this would have been a split grill, but it may also come from the far left row of the sheet, and the left stamps missed the grill due to misalignment.
With 2004 P.F. certificate. Scott Retail as pair of No. 134 and pair of No. 145 with no premium for the variety of a multiple containing one with and one without grill.