654 - Gonoa (Tibesti). - Two spirals in reverse order, with the higher spiral continuing the lower one. Mediocre engraving. Diameter of one spiral: 0.15 m.
654 - Gonoa (Tibesti). - Two spirals in reverse order, with the higher spiral continuing the lower one. Mediocre engraving. Diameter of one spiral: 0.15 m.