The Platinum Century #3776 Prism Crystal is a limited-edition demonstrator fountain pen from Japan. It features a fully transparent resin body that allows visibility of the ink and internal components. This model is part of the #3776 Century series, named after the height of Mount Fuji (3,776 meters). The pen is equipped with a 14KT gold nib and Platinum’s Slip & Seal cap mechanism, designed to prevent ink from drying out during storage. It uses Platinum’s proprietary cartridge/converter filling system and is suitable for everyday writing or collection.

• Body material: Clear AS resin (demonstrator)
• Nib: 14K gold
• Filling system: Cartridge / converter (Platinum proprietary)
• Cap mechanism: Slip & Seal (airtight)
• Trim: Gold-colored
• Country of origin: Japan