With the Humboldt, the purchase should preferably take place in a Montblanc boutique, since the wood inlays of cap and barrel do not always sit congruently; there were examples that for this reason were not released for final acceptance in Hamburg, so a personal inspection is recommended. For cleaning, the fountain pen need not be placed in water — it suffices to immerse only the nib together with the feed in water, so that the wooden section is spared. The purchase at list price and the writing with an EF nib does not, experience shows, lead to noticeable loss of value, since Limited Editions are also demanded by collectors in used condition.
Related pages on fountainpen.de:
• Patron of Art Alexander von Humboldt: fountainpen.de/patron-humboldt-en.htm