At this point, Kaweco Bronze and Brass look quite similar. I like

Kaweco Bronze patina : r/fountainpens

Kaweco Bronze Sport Fountain Pen - Extra Fine - NEW in Box

So you are ready to take the next step in the fountain pen world

Pen Reviews – The Serial Doodler

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Kaweco Brass Sport fountain pen review - The Pen Company Blog

Kaweco Special Brass Fountain Pen – Wonder Pens

Bronze vs. Brass Kaweco Sport & I Cannot Buy the Lamy 2K!

Request] How to remove rust from brass. : r/howto

Kaweco Limited Edition Bronze Sport Fountain Pen – The Reader's