GB Machin SG X968a | TCM NE149b 24p Terracotta ACP (1989) Imperf Pair and Blind Perfs Margin Block of 6 U/M (Very Rare)

24p Terracotta ACP (1989) Imperf Pair and Blind Perfs Margin Block of 6 The Complete Machin Catalogue number TCM NE149b. Block of 6 with top two stamps imperf on left, right and top, and blind perfs on bottom. Bottom 4 stamps are separated from the margin. This item was part of a large estate of Machin stamps. It was originally purchased from B. Alan Ltd., a well-known dealer in the UK for 50 years. Its owner, James Skinner, was also editor of the Connoisseur Catalogue of Machin Stamps, the “go to” catalogue for decades. The collector purchased this item between 1990-2006 where it remained until 2025. Provenance in the form of the original invoice or price list from B. Allan Ltd. describing the item is provided.