12c blue 'San Martin' issue, watermark 'Large Sun' with 'M.G.' overprint (Ministry of War) a mint block of four. A difficult stamp. (SG OD24B)
12c blue 'San Martin' issue, watermark 'Large Sun' with 'M.G.' overprint (Ministry of War) a mint block of four. A difficult stamp. (SG OD24B)