The highly anticipated S.T. Dupont 'Diamond Guilloche' collection for 2020 is a luxurious series of fine writing instruments created exclusively for the US market. This new collection combines old world Dupont glamour with an updated modern design. S.T. Dupont brings together one of their oldest and most treasured crafting techniques 'guilloche under lacquer' to the newly updated large size 'Line D'. Available in 3 vibrant colors: Ruby, Sapphire and Aquamarine, the pens combine the skills of the S.T. Dupont master goldsmith with the expertise of their master lacquerer.
Guilloche is an intricate decorative technique created by engraving a surface with great precision and then adding a transparent layer of resin, enamel, or in the case of S.T. Dupont’s fine writing instruments, a natural lacquer over the engraved surface. The solid brass body and cap is lacquered multiple times and hand polished to create a smooth, unique texture on the surface that differs from each pen as no two writing instruments are identical.
The 'Diamond Guilloche' collection features the namesake technique that is French for "engine turning." The diamond design is created by an engine turning process that engraves very precise, intricate, geometric patterns into an underlying material. For this latest launch, S.T. Dupont selected a finely detailed diamond pattern which is then overlaid with sumptuously colored Urushi lacquer, the result is simply spectacular.
S.T. Dupont's artisans add layers of natural lacquer to the surface of the diamond patterned guilloche in a months long process involving many applications and polishing to impart depth and mystery to each finish. The engraving causes the reflection of light through the overlay of natural Urushi lacquer creating a stunning display of light and color.
The collection is launched on the newly updated Line D Large pen; recently remodeled with a new bold blazon on the articulated clip, an enhanced Dupont 'D' in the crown of the cap and a perfectly balanced shape for exceptional writing. The pen cap closes with Dupont's iconic 'cling' and features a fluted grip section for a superb writing experience. This sapphire blue fountain pen is accented with palladium trim.
Each fountain pen receives over 150 handcrafted operations and controls to ensure writing perfection. The fountain pen features S.T. Dupont's famous 'click' to echo their famous lighter 'cling'. The fountain pen is enhanced with the S.T. Dupont 14k gold nib, and fills via cartridge/converter (included).
With the natural lacquer exclusive patina effect, each piece is one of a kind. While the procedure remains the same, the result is always different. Depending on the color contrasts obtained, the handmade production process gives the product its very own depth and soul.
S.T. Dupont is a leading brand of luxury products designed and made in France. Founded in Paris in 1847 by its namesake Simon Tissot Dupont, today S.T. Dupont is world famous for their exceptional writing instruments. S.T. Dupont has been a supplier to Royals, Aristocracy and celebrities including: Coco Chanel, Leonardo DiCaprio, the British royal family, Audrey Hepburn, and Marilyn Monroe.
In the 1930s, S.T. Dupont perfected the bonding of the nigh indestructible Urushi lacquer onto metal, offering a strong luxurious finish to their writing instruments. The company mastered the art of fine lacquer by rediscovering and perfecting ancient Japanese and Chinese techniques. This process has become a staple of the luxury S.T. Dupont brand through the present day.
S.T. Dupont products are still made at the original workshop located in Faverges near the French Alps. Their writing instruments are world renowned for precise engineering and intricate goldsmith manufacture. They are committed to innovation and cutting-edge technology while also retaining status as a Heritage brand.
- S.T. Dupont
- Fountain Pens
Whether or not the barrel of the pen is translucent, allowing you to see the ink and filling mechanism inside.
- Body Material
- Urushi lacquer over brass
- Cap Type
How the cap is opened/closed from the barrel of the pen. Some common options include Snap-Cap, Screw-Cap, Magnetic Cap, or Capless (no cap).
- Compatible inks & refills
Which ink this pen will accept. Choices include bottled ink and various styles of pre-filled ink cartridges.
- Bottled inks, Standard international short ink cartridges, Standard international long ink cartridges
- Filling Mechanism
How the pen fills with ink. Click here to watch our video tutorial on common filling mechanisms.
- Cartridge, Converter
- Grip Material
- Nib Size
- Extra-Fine, Fine, Medium
- Nib Color
- Nib Material
- 14k Gold
Whether or not the cap fits securely onto the back of the barrel when open.
Whether or not the nib/tip can retract into the body of the pen (usually for click or twist-open style pens).
- Diameter - Body
- 12.6mm (0.50in)
- Diameter - Cap (without clip)
- 15.2mm (0.60in)
- Diameter - Cap (with clip)
- 19mm (0.75in)
- Diameter - Grip (mm)
Measured from the place most people choose to rest their fingers, which varies with each pen.
- Length - Body
The measurement from the back end of the barrel to the tip of the nib.
- 134mm (5.28in)
- Length - Cap
- 50mm (1.97in)
- Length - Nib
The measured length of the visible portion of the nib when it is installed in the pen, from grip to tip.
- 18.8mm (0.74in)
- Length - Overall (Closed)
- 148.9mm (5.86in)
- Length - Overall (Posted)
When the cap of the pen is posted onto the back of the pen body, this is the measurement of the entire pen including the nib.
- 164.3mm (6.47in)
- Weight - Body
If a converter is included with the pen, this weight is reflected in the total.
- 36g (1.27oz)
- Weight - Cap
- 28g (0.99oz)
- Weight - Overall (g)
- Max Ink Capacity - Cartridge
The maximum volume of ink that can fit in the pen when using a cartridge.
- Max Ink Capacity - Converter
The maximum volume of ink that can fit in the pen when using a converter.
FAQs about Fountain Pens
How do I fill a fountain pen with ink?
It depends on the pen's filling mechanism, which you can find in the Technical Specs section above.
Here's a quick definition of the most common filling mechanisms:
- Cartridge - A small, disposable, sealed plastic reservoir that holds fountain pen ink. These come pre-filled with ink, and typically you just push to insert them into place and you'll be ready to write! Check out our quick guide here.
- Converter - A detachable and refillable ink reservoir that allows you to use bottled ink in a cartridge-accepting pen. Typically you will install the converter into the grip section, dip the nib/feed into the ink, and twist or pull the converter knob to draw ink into the converter. Here's a video for how to fill a cartridge/converter pen using a LAMY pen as an example.
- Eyedropper - A pen that utilizes the entire barrel as a reservoir for ink. Ink is directly filled into the barrel, allowing for a high ink capacity. Here's a video on how to do it!
- Piston - A type of filling system that uses a retracting plunger inside a sealed tube to draw ink into a pen. They are typically either twist or push-operated. These pens cannot accept cartridges or a converter, and only fill from bottled ink.
- Vacuum - A push-style piston that uses pressure to fill the large pen body with ink. They seal the ink chamber when closed, making it ideal for flying without risk of leaking. Check out our video on how to use a vac filler here.
Check out more info on these filling mechanisms including a video on how to fill each one on our blog.
How do I clean a fountain pen?
It depends on the filling mechanism, but it mostly comes down to flushing it out with water, and sometimes a little bit of Pen Flush if the ink is really stuck.
It's a bit easier to show than to tell, so we've put together a few quick videos showing you the process:
How often do I need to clean my fountain pen?
We recommend a good cleaning every 2 weeks, and any time you change ink colors.
Water will usually do the trick, but we recommend you use our Goulet Pen Flush if the ink has been left in the pen for a while and could have dried up, or when you’re switching ink colors.
My pen won’t write! What do I do?
First things first... make sure you have ink in the pen! Be sure that the ink cartridge or converter is seated properly in the pen, and that you aren't out of ink.
We always recommend you give your pen a good cleaning first, using our Goulet Pen Flush, or a drop of dish soap in some water. New pens often have some machining oil residue left in the feed, so a good cleaning often does the trick first.
If that still doesn't work, try priming the feed. This consists of either dipping your pen nib and feed in ink, or forcing ink from the converter down into the feed.
If it’s still not working after that, please reach out to us so we can help!
What's your return policy?
You can submit a return request within 30 days of your order date. You can read all our Return Policies here.
To initiate a return, please submit a request at the Return Portal. Our Customer Care team might reach out to you for more information.
Please note we are unable to accept a return of any Namiki or Sailor Bespoke fountain pen for any reason once it has been used with ink. Please thoroughly inspect and dry test the pen before use.