Berliner Tageblatt Und Handels-Zeitung Apr 6 1910  •  Berlin, Brandenburg, Germany, p. 14.

In lieu of cards. 

Max Berger and his wife Helene (née Hamburger) have the honor of respectfully announcing the engagement of their daughter Grete to the practicing dentist Eugen Silbermann from Breslau. 

Liegnitz, April 4, 1910. 

Grete Berger
Eugen Silbermann
engaged

Breslau. Liegnitz. 

Reception: Sunday, April 10, 1910.

Also noticed in the Berliner Börsen-Zeitung Apr 7 1910  •  Berlin, Brandenburg, Germany, p. 14

The Civil Marriage as registered in the "Familiernstammbuch". Dad describes this as what "was at one time used as a semi-official record of births, marriages and deaths in the family. My birth is the last of two entries--my parents' civil marriage is the first.

German Wikipedia has short article on these.