Kaweco Ballpoint Pen Sport Brass

The Kaweco Sport ballpoint in brass is the heaviest and most substantial member of the Sport family. Crafted entirely from solid brass – each component produced via CNC machining – it delivers a rich, warm weight in hand that surprises for its pocket-sized format. The unlacquered surface bears no protective layer: the metal appears raw, cool-gleaming, and develops its own distinctive patina through use.

Features

• Solid brass, CNC-machined: All brass components are produced via CNC machining – resulting in tight tolerances, clean edges and an evenly-formed octagonal grip that feels secure despite the smooth metal surface.
• Unlacquered raw finish: No lacquer coating to wear away. The brass changes over time through skin contact and light exposure: warm, bronze-like tones develop and an individual patina emerges, unique to every pen. Those preferring the original state can refresh the surface with metal polish.
• Heart-curve mechanism: The push mechanism employs a heart curve rather than a simple spring – delivering precise, silent engagement in both directions. No rattling, no unwanted lead extension.
• Metal tip with D1 refill: The standardised D1 format allows switching between different line widths (0.8 mm fine, 1.0 mm medium, 1.2 mm broad) and ink colours. Kaweco D1 refills feature soft paste that flows smoothly and requires minimal pressure – the pen's own weight provides comfortable writing feel.
• Compact pocket format: At 10.5 cm long, the pen fits any trouser pocket or small notebook case. At around 49 g, the weight is unusually heavy for the size – those familiar with it appreciate it; first-time users are pleasantly surprised.
• Silver-tone accents: The logo cap provides a contrasting accent against the warm brass.

Use & Tips

• Everyday companion in pocket format: Ideal for quick notes on the go, in the workshop, at the office or whilst travelling. Robust brass forgives rougher conditions.
• Swap refills for greater precision: The included blue D1 refill (1.0 mm) can be replaced with a finer 0.8 mm – ideal for narrower rulings in small notebooks or finer handwriting. A black refill is recommended when document permanence matters – ensure the refill is explicitly marked as document-safe.
• Shape patina intentionally: To accelerate patina development, carry the pen directly in your trouser pocket without a case. For an even, polished finish, use a soft cloth with metal polish.
• Supplied in Kaweco metal case: The included metal case protects the pen and can be reused as a compact transport case.
• Pairing with clip: The Sport clip (sold separately) clips on and off easily, making the pen wearable on notebooks or shirt.

For Writing Instrument Enthusiasts

The D1 refill is an international compact-format standard, originally developed for multicolour and pocket-format pens. Kaweco is one of the few manufacturers offering this refill in three line widths. The brass used in the Sport ballpoint is lead-free (Eco Brass) and nickel-free – important for those with extended writing sessions involving direct skin contact. The pen's own weight (approx. 49 g) allows writing with minimal active pressure: the refill is pressed onto the paper by the weight alone, relieving hand strain during long writing periods. The octagonal shape, a Kaweco design signature since the 1930s, prevents the pen rolling away on inclined surfaces.

Technical Specifications