A volcanic surge of concentric color — silver-white waves undulating over rooftops in crimson, gold, and green — captures Friedensreich Hundertwasser's 1966 painting "Sunset (Raku Yoo / Sonnenuntergang)" in this striking black-bordered art reproduction card published by Gruener Janura AG of Glarus, Switzerland in 1981. The composition floods the upper two-thirds with layered arcs suggesting both a setting sun and a billowing architectural canopy, while below, stylized buildings bearing the artist's characteristic windows-as-eyes motif anchor the scene in his signature urban fantasy. Japanese kanji reading "落陽" (setting sun) appears at upper right, one of many cross-cultural references Hundertwasser embedded throughout his oeuvre. The card itself is a high-quality matte-surface reproduction printed on thick black-edged stock, numbered 603A, and is unnumbered as a limited edition despite the front inscription reading "1/200 (603A) Catcadroffen Hauptbad 1966." The reverse carries only publisher and title information in German, English, and Japanese — no message space, suggesting this functioned as a collector art card rather than a mailable postcard. Condition is excellent with only a small reflective blemish (likely a label remnant) at upper center of the image.