3c Z. Grill, Thorp Patent Experimental Trial Color Essay + (Unstated Value) Z. Grill, Essay on Horizontally Laid Salmon Paper (85C-E2 var, 85C-E2).
Combination block of six in Red, top four 3c stamps are No. 85C-E2 var., bottom two sheet margin stamps are No. 85C-E2, original gum, h.r., Very Fine and scarce, this block is conclusive proof for the footnote in Scott which states that No. 85C-E2 comes from fully perforated selvage of the 3c and 12c Z Grill essay panes (which consisted of 12 subjects), for some reason the Scott Catalogue does not list the 3c Z Grill essays but we hear they will soon be added back to the catalogue, Scott Retail for two of No. 85C-E2 and four of the similar but more plentiful 12c Z Grill essays
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