E STAMPS. 1982 Princess Diana 21st Birthday $1 & $2.50 (#540-1), large (480x650mm) MOCKUP for SHEET of 16 panes of nine,

sketched on perforated blank sheet of 165 (15x11) and extending onto large sheet selvage top & bottom,

on each pane is affixed an imperf MASTER PROOF of $1 (x8) or $2.50 (x8),

panes appear to consist of eight stamps plus label,

designated "G," "S" or central "B&W,"

one $1 proof and one $2.50 proof are overlapped by additional MASTER PROOFS of Royal Birth $1 or $2.50 showing that format was intended for sheets of both sets,

hand-drawn gutters and many interesting ms. notations incl. "6 PLATES, 1 Blue, 1 Yelo, 1 Red, 1 Black, 2 B'Ground, 1 Mauve," etc.,

intriguing as SG states that sets were issued in sheets of eight stamps plus two labels, Fine.

Too big for scanner, we illustrate two portions.