Nice patina would develop as the brass pen is oxidised. Th…

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Kaweco Brass Sport before and after 3 weeks of use. : r/fountainpens

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Heres how the brass pens patina look different from exposing to

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Stilo&Stile

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Kaweco Brass Sport before and after 3 weeks of use. : r/fountainpens

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Kaweco Special Fountain pen, brass