26.5 x 19.5 cm. Violet, smoothed original morocco binding with spine title, oval cover vignette in yellow and gold, gilt edges, and gilt head edges. (Binding: H. Sperling, Leipzig). - Third volume in the "Das Prisma" series. One of 200 numbered copies on handmade laid paper. This is one of a few of the deluxe edition bound in full leather by H. Sperling, Leipzig, in the delicate color of dark purple. In mint condition. The imprint is signed by the artist.