The Diamond 580 comes with a benchmark ink-filling mechanism and has all detachable parts.
Diamond 580, a classic fountain pen with a piston ink-filling system.
Extra Fine PointCalligraphy
Available in a variety of tip sizes, this replacement nib is compatible with the TWSBI Diamond 580 fountain pens. Its 1.1 mm stub nib is great for practicing calligraphy or just giving your writing some extra flair.
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