Tribute to Prussian naturalist, explorer, philosopher and scientific advocate Alexander von Humboldt. Black grenadilla wood with inlaid sterling silver panels engraved in the style of the Latin American cultures that Humboldt studied. Medium two-tone 18K gold nib engraved with nautical motif. Outer sleeve, outer box, lacquered wood display box, booklet. Limited Edition: 3021/4810. Excellent condition, not inked, light patina to endpiece.