TWSBI Diamond 580 Caribbean Blue & Onyx Fountain Pen - Preowned leaning on an ink bottle uncapped showcasing the detailing on the nib.
TWSBI Diamond 580 Caribbean Blue & Onyx Fountain Pen - Preowned laying across its own cap, crossed, with a focus on the nib.
TWSBI Diamond 580 Caribbean Blue & Onyx Fountain Pen - Preowned laying on top of its cap in a crossed position showing full view of the entire uncapped pen.
 A macro shot of the nib with its intricate detailing and logo engraving for the TWSBI Diamond 580 Caribbean Blue & Onyx Fountain Pen - Preowned.
An overhead view of the TWSBI Diamond 580 Caribbean Blue & Onyx Fountain Pen - Preowned uncapped.
A full view of the TWSBI Diamond 580 Caribbean Blue & Onyx Fountain Pen - Preowned uncapped, with its cap laying next to the pen.
TWSBI Diamond 580 Caribbean Blue & Onyx Fountain Pen - Preowned capped, leaning against an ink bottle.
Zoomed-in view of the top of the cap with the finial on the TWSBI Diamond 580 Caribbean Blue & Onyx Fountain Pen - Preowned.

TWSBI Diamond 580 Caribbean Blue & Onyx Fountain Pen - Preowned

Regular price$79.99
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Size

U.S. Orders:

  • Free Shipping: We offer free shipping for all U.S. orders over $20, including Alaska and Hawaii.
  • Standard Shipping Fee: For U.S. orders below $20, a flat shipping fee of $5.99 will be applied.

International Orders:

  • Shipping Rates: International shipping rates are calculated based on the weight of the package and the destination country.
  • Exclusions: Currently, we do not offer shipping to Russia and South Africa.

Please note that shipping times may vary depending on the destination and other factors beyond our control. Customs duties, taxes, and any additional fees associated with international shipments are the responsibility of the customer.

  • Returns can be initiated by clicking the link here.
  • Return Period: Customers may return items within 7 days of order delivery.
  • Refunds: A full refund will be issued for returned items.
  • Condition of Return: To be eligible for a refund, the item must be returned in its original condition, including all original boxes and packaging.
  • Restocking Fee: For used items or items missing their original packaging, a 20% restocking fee will be applied.
  • Refund Method: Refunds will be processed using the original form of payment.
  • Return Shipping: Customers are responsible for the shipping costs associated with the return, unless the return is due to a product defect or an error on our part.
  • Return Process: To initiate a return, please contact our customer service team with your order details and the reason for return. Once the return is approved, you will receive further instructions on how to proceed.
  • Refund Processing Time: Please allow up to 7 business days for the refund to be processed after we receive the returned item.

U.S. Orders:

  • Free Shipping: We offer free shipping for all U.S. orders over $20, including Alaska and Hawaii.
  • Standard Shipping Fee: For U.S. orders below $20, a flat shipping fee of $5.99 will be applied.

International Orders:

  • Shipping Rates: International shipping rates are calculated based on the weight of the package and the destination country.
  • Exclusions: Currently, we do not offer shipping to Russia and South Africa.

TWSBI Diamond 580 “Caribbean Blue & Onyx” Fountain Pen

Mint Preowned Condition - with Original Box

A vibrant and modern fountain pen from TWSBI, the Diamond 580 Caribbean Blue & Onyx offers a fresh burst of color combined with practical design and quality performance. The clear resin barrel showcases your ink and highlights the bright turquoise-blue Caribbean accents alongside deep Onyx black trim for a dynamic, stylish look that stands out whether on your desk or in your hand.

The pen features a dependable stainless steel nib that delivers a smooth, consistent writing experience — ideal for daily journaling, note-taking, or correspondence. Its piston-filling mechanism gives you generous ink capacity and convenience, while the ergonomic grip and balanced build make it comfortable for extended writing sessions. The transparent body also allows you to appreciate ink levels and the inner workings of the piston system.


Key Features

  • Transparent resin barrel — lets you monitor ink level and enjoy the classic “Diamond” faceted look

  • Turquoise-blue Caribbean Blue accents + Onyx black trim — bold, eye-catching, modern aesthetic

  • Stainless steel nib — smooth, reliable writing suited for everyday use

  • High-capacity piston filling system — ideal for long writing sessions without frequent refills

  • Balanced, ergonomic build and grip section — comfortable for extended writing or note-taking

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