Montblanc - Montblanc Writers edition Agatha Christie - Ballpoint pen

The title highlights brand, model, year, and its limited nature. The specific numbering (04642/25000) is an example: use it if it is legible on the bottom of your pen, as it reassures the buyer.

Key points for the description:

Conditions: the pen is used, without original box or warranty. There are signs of wear on the barrel (especially at the bottom) as visible in the photos.
Characteristics: state that it is a 1993 Montblanc limited edition “Writers Edition Agatha Christie.” Emphasize the black resin body and the 925 silver snake clip with ruby eyes. Indicate the mechanism (twist action ballpoint) and the serial number engraved (e.g. “no. 04642/25000”).
Sale contents: specify that the auction includes only the pen (possibly with cartridge/refill, if still available), without the original Montblanc box or other accessories. If you have manuals or certificates, mention them; if not, be clear that they are missing.
Integrity: highlight that despite the visible wear, the pen is fully functional and authentic. Useful phrases: “used but original and working,” “frontally intact, minor signs,” “Montblanc star logo perfectly secure,” etc.
Bullet list (or short paragraphs) recommended for the description:

Brand/Model: Montblanc Writers Edition “Agatha Christie” (1993 ballpoint pen).
Materials/Design: black resin body; snake-shaped clip in 925 silver with ruby eyes.
Condition: used, signs of use (specify where and how much). No holes or significant cracks.
Limitation: no. 04642/25000 engraved on the bottom.
Accessories: DOES NOT include original case or warranty, only the pen as shown. (Optionally include photos of the serpent, engraved signature, if present, generic papers or charger.)
Final note: advise looking closely at the photos for details. An example phrase: “The photos show the pen in its real condition. It remains a highly captivating collectible item, despite the slight signs of use on the body.”