You need to analyze correctly the graph. Firstly you can define all the nodes of each column with the same style. You can use positioning to place the nodes. The main column is easy to draw, for the other column, I show you some difficulties like [left= of m1.south west,anchor=north east] and [left= of $(m2.west)!.5!(m3.west)$ ].
\documentclass[11pt]{scrartcl}
\usepackage{tikz}
\usetikzlibrary{%
arrows,positioning,
calc
}
\begin{document}
\small
\begin{tikzpicture}
% main column nb 3
\begin{scope}[node distance=1.5em,
every node/.style={align=center,text width=10em,draw,ultra thick}]
\node (m1) {Soc. Anonima\\
Marca Corona\\
1934};
\node (m2) [above= of m1] {MMMMMMMMMMM\\
xxxxxxxxxxxxx\\
1932};
\node (m3) [above= of m2] {MMMMMMMMMMM\\
xxxxxxxxxxxxx\\
1920};
\node (m4) [above= of m3] {MMMMMMMMMMM\\
xxxxxxxxxxxxx\\
1910};
\node (m5) [above=4.5em of m4] {MMMMMMMMMMM\\
xxxxxxxxxxxxx\\
1869};
\end{scope}
% main column nb 2
\begin{scope}[node distance=.75em,every node/.style={align=center,text width=10em,draw}]
\node (l1) [left= of m1.south west,anchor=north east] {SAIME\\
\ \\
1932};
\node (l2) [left= of $(m2.west)!.5!(m3.west)$ ] {LLLLLLLLLL\\
xxxxxxxxxxxxx\\
1926};
\node (l3) [left= of m4] {LLLLLLLLLL\\
xxxxxxxxxxxxx\\
1911};
\node (l4) [left= of m5] {LLLLLLLLLL\\
xxxxxxxxxxxxx\\
1869};
\end{scope}
%edges
\draw[ultra thick] (m1)--(m2) (m2)--(m3) (m3)--(m4) (m4)--(m5) ;
\draw[dashed] (l1) |- (m2);
\coordinate [above=.5em of m4] (line);
\draw[dotted] ($(line) + (-8,0)$) -- ($(line) + (8,0)$);
\end{tikzpicture}
\end{document}
