Heavy blackletter; Rudolf Koch’s first type from 1909

On an old page full of type specimen from the 1930s, the type is described as ”Schwabacher (used by the Deutsche Reichsbahn [German Imperial Railway]).“ 
As a matter of fact, it is the first print of the Offenbach script master Rudolf Koch, who came out with this typeface in 1909.
At that time, it was given the name ”Neudeutsch“ (New German). 
Later, it became very popular under the name Koch-Schrift, and was at times the official typeface of the Deutsche Reichsbahn (German Imperial Railway).