Guatemala, 1871, 5c Light Bister Brown, Imperforate, Tête-Bêche, top right corner margin block of 4 with top right stamp inverted, full o.g., ample to large margins, fresh and Very Fine, a very rare tête-bêche multiple; signed Diena. Scott No. 2c  $2,600 for tête-bêche pair. $0 (Image)