This is an addition to Semaphore's answer:
This is the 10 D-Mark note of the third edition of the Deutsche Mark, the Gemäldeserie BBk I (1961) (painting series).
It was designed by the Swiss designer and artist Hermann Eidenbenz who was living in Hamburg, Germany.
It was printed between 1961 and 1990. There are five printing runs which are mentioned under the signature in the lower left corner:
1: 2. Januar 1960 (January 2nd, 1960)
2: 2. Januar 1970 (January 2nd, 1970)
3: 1. Juni 1977 (June 1st, 1977)
4: 2. Januar 1980 (January 2nd, 1980)
5: Change of copyright, no change of date
The red "Rechengeld" stamp means that it is money for children to learn using cash. The blue stamp "Dringend" only means "Urgent", I do not know what purpose it has.
To all anglophones: It is Deutsche Mark, D-Mark or even shorter simply Mark, not
Deutschemark or Deutschmark or — simply stop it, ok?
Yeah, I know how it is called in English, but it was always grating to German ears.