Philadelphia Bank Note Co., 1c-90c Deep Brown Orange, Sheet of 36 on Old Glazed Paper (183-E3c var/191-E2b var).
Includes 1c, 2c, 3c, 6c, 7c, 12c, 24c, 30c and 90c, pencil notations in margin with "5" next to 7c indicates intention to change value, additional pencil at bottom with hand-drawn corner and list of denominations including 10c and 15c, folded vertically in gutter, few light creases, otherwise Very Fine, unique essay, illustrated and described in Essay-Proof Journal
No. 45, pp. 48-49, Scott Catalogue only lists the half-pane of 20 (value $800.00)
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