Jamaica SG 31 Proof 1900-01 Llandovery 1d die proof in black

1900-01 Llandovery Falls 1d, stamp-size essay die proof in black on thin card, made from a die proof of the single colour issue with hand painting to remove the middle frame line around the vignette as used for the bi-coloured issue, dated "4/1/1900" on reverse. A rare and important proof. Ex 'Libra' (Spink 20 Apr 2022, lot 354), Mahfood (Spink Shreves 28 Jan 2011, lot 1160) and Surtees (RL 15 Sep 1976, lot 479)