Cartier. Diabolo de Cartier Rollerball Pen A Diabolo de Cartier rollerball pen, a model distinguished by its elegant proportions and the signature cabochon set to the cap finial, a design element derived from Cartier's celebrated jewellery and watchmaking traditions. Introduced as part of the Maison's expanding range of luxury accessories, the Diabolo quickly became one of Cartier's most recognisable writing instruments. Balancing refined aesthetics with everyday practicality, the model exemplifies Cartier's ability to translate its distinctive design vocabulary into functional objects. The collection remains particularly popular among collectors for its timeless appearance and close connection to the Maison's broader decorative arts heritage. Model: Diabolo de Cartier Type: Rollerball pen Condition: Excellent condition. Accompanied by: Original Cartier presentation box and accompanying documentation. Shipping: Shipped worldwide with tracking.