The Lamy st Twin pen incorporates a black ballpoint pen and a 0.5mm pencil in the same barrel. It is approximately 9.5mm in diameter and the stainless steel barrel has a sleek matte finish and circular grip section. This is offset by the pocket clip and push button which are made of highly polished steel.
The ballpoint pen or lead is advanced and retracted via a push button. The lead can be replaced with either Lamy M41 0.5mm lead or any other brand of 0.5mm lead. The eraser can be replaced with Lamy Z15 replacement erasers. The ballpoint pen can be replaced with Lamy M21 refills available in four different colours.
Model no 645.
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