Platinum BISO Fountain Pen Named from the Japanese characters for beauty (美) and harmony (奏), the BISO lives up to its meaning—crafted to help writers express themselves with elegance and calm. Its slim, lightweight body is made from shimmering pearlescent resin that subtly shifts color with light and angle, offering both comfort and visual allure. Designed to feel noticeably lighter and slimmer than the #3776 Century, it’s ideal for extended writing sessions. Equipped with a smooth gold-plated stainless steel nib and compatible with both cartridges and converters, the BISO delivers a refined yet effortless writing experience perfect for journaling, correspondence, or everyday notes. Select limited-edition colors, like Sparkle Mint Green and Mystic Purple, are capped at just 1,500 pieces worldwide, making each one a beautifully rare writing companion.