Lot 51529 – 1862-68 1s slate-grey, neatly cancelled « A10 »

1862-68 1s slate-grey, a large example with perforations clear of design, neatly cancelled « A10 »; one corner perf lightly. creased and small split at left, a fine and exceptional example, ex Peter Jaffé and « Tatiana », with yellow BPA (2021) certificate which states « there is no consensus as to the original colour of this controversial stamp » (SG £900).