English fountain pen Mentor Diploma marbled celluloid body with chromed profiles, production of the years 1940-50 screw hood, ✒ Pennin Smoothline medium nib tested writing ⚙️ Mechanism with background button works 🔍 Conservative state as a photo 📦 Complete with case 📖 An era of ink and genius: the celluloid, the first thermoplastic resin invented in 1863, has revolutionized the world of writing with its lightness, elasticity and chromatic brilliance. Used by historical brands, it requires long drying times and complex craftsmanship. It remains one of the most fascinating materials ever used for the creation of fountains, capable of making each specimen unique over time. .
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