Not a week passed since I complained about my Kaweco pen. And you know what?! It happens Kaweco makes replacement parts! And you can easily purchase it from your dealer. So, half an hour of walking (I was lucky to live in a walking distance from the only official Kaweco dealer in Moscow, haha) and I'm a happy owner of working-again pen. And also I could get replacement pen of other size. They have not only "f"s, but also "ef", "m" and "b". I restrained myself, and took only "f". But now I know where to get others.
Ah.
Ah!
Ah…
Ah.
Ah!
Ah…