@saputello Danke. Das ganze sieht jetzt so aus und so gefällt es mir.
\documentclass{article}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\def \n {10}
\def \radius {3cm}
\def \radi {3.2cm}
\def \margin {8} % margin in angles, depends on the radius
\foreach \s/\nodetext in {1/a,2/+,3/3,4/k,5/du,6/m,7/!,8/o,9/q,10/b}
{
\node[draw, circle] at ({360/\n * (\s - 1) + 270}:\radius) {\nodetext};
\draw[<-, >=latex] ({360/\n * (\s - 1)+\margin+270}:\radius)
arc ({360/\n * (\s - 1)+\margin+270}:{360/\n * (\s)+270-\margin}:\radius);
}
\foreach \s/\nodetext in {1/x,2/y,3/w,4/e,5/du,6/m,7/!,8/?,9/9,10/12}
{
\node at ({360/\n * (\s -1) + 270 - 180/\n}:\radi) {\footnotesize \nodetext};
arc ({360/\n * (\s - 1)+\margin+270}:{360/\n * (\s)+270-\margin}:\radi);
}
\end{tikzpicture}
\end{document
