These are paste papers from an early 20th-century edition of the German translation of Le déserteur, an opéra comique by the French composer Pierre-Alexandre Monsigny. Book from the collection of Leon Laserson.
Among other exciting things, I found in the last volume of the Dutch Printers Yearbook from 1911, was an article by Reinier Willem Petrus de Vries Jr. about a technique that "recently" attracted the attention of some bookbinders — starch marbling.
The book is another find at the book market in the Hague. The Life of Willem III (Het Leven van Willem III) by Frans Bührmann was published in Amsterdam in 1874. But I'm not sure whether the endpapers come from the same time.