A copy of "Die Bibel oder die ganze Heilige Schrift des Alten und Neuen Testaments" (The Bible or the complete Holy Scripture of the Old and New Testaments), specifically a German translation by D. Martin Luther, published in Berlin in 1920.

Luther Bible: This is a prominent edition of the Luther Bible, which is a German-language Bible translated from Hebrew and ancient Greek by Martin Luther and his collaborators, significantly shaping the German language and Protestant Reformation.
1920 Edition: The inscription on the cover clearly states "Berlin 1920", indicating the publication year of this specific edition.
Content: As indicated by "Alten und Neuen Testaments", this edition contains both the Old and New Testaments of the Christian Bible in Luther's influential German translation.
Significance: Martin Luther's translation made the Bible accessible to a wider audience in Germany, playing a crucial role in the development of the German language and the spread of Protestantism.