Lot 50024 – 1840 1d Rainbow trial pair in blue from the right of the sheet each neatly cancelled by black Maltese cross

1840 1d Rainbow trial pair in blue from the right of the sheet, close to very large margins on other sides, each neatly cancelled by black Maltese cross and showing an 1mm central horizontal razor cut, which are believed to relate to abrading experiments reported on the 17th September by Rowland Hill to Sir Francis Baring, very rare, ex Tes (S.G. £20’000+).