GJ.2, sheet corner, mint with full original gum, signed by Victor Kneitschel on back, excellent and rare! (Image)

GJ.6b, 12c. Little Envelope, with VARIETY "2 without serif", mint full original gum, signed by Victor Kneitschel on back, excellent and rare! (Image)

GJ.7, mint original gum, signed by Kneitschel on back, excellent quality, rare! (Image)

GJ.10, mint full original gum, excellent quality, rare! (Image)

GJ.12a, with INVERTED OVERPRINT var., VF quality, very rare! (Image)

GJ.22b, with TRIPLE overprint var., mint without gum, excellent quality, very rare! (Image)

GJ:29, 90c. Saavedra, MNH (very rare) (Image)

GJ.30a, pair WITH AND WITHOUT overprint, VF quality, extremely rare! (Image)

GJ.34, 90c. Saavedra with red ovpt., used, excellent and rare! (Image)