The usage of high quality materials is one of the most remarkable facts of this case. Besides the wood of the Thuja tree and mother-of-pearl, bird-maple wood (and ivory) was(were) also used in the creation process of this amazing object. The exquisite execution and the exact workmanship mirror the high demand of the artist on his own works. A contemporary picture of a nearly identical case was published on March the 6th 1912 in the "Kunstgewerbeblatt". The same case is now displayed in the "Germanisches Nationalmuseum" in Nuremberg and is also published in the book "Jugendstil aus Nurnberg" by Claus Pese on page 276.