1927-1945: Pictorials color trial proofs in unissued colors with "HARRISON's SPECIMEN" overprints: Dome on the Rock 4 m grey-green (instead of rose-pink), Rachel'S Tomb 10 m blue (instead of slate) & 90 m bright blue (instead of bistre). Each in upper-left corner block of 25 with plate 1 controls in margins, 4m top 2 rows double perfs & 10 m top row double perfs. Very fresh MNH.Bale T92, T97 & T 101 cat US$ 112,500 for hinged singles, so we estimate that such never hinged control blocks should be valued at least double, so should be US$ 225.000+. Spectacular & unique items. Each Block with Ceremuga certificate (2016). (M) (Image)