Website/Catalog  (2012)  
 
Website

Zeus, HSet, my, 1959, [Doubloons × unknown], Kern, J. J.; bud long, pointed; 4-6 cm., 25 petals, loose, slight fragrance; recurrent; foliage leathery, dark; vigorous (15-20 ft.) growth

Book  (2001)  Page(s) 93.  
 
Zeus Large-flowered Climber, medium yellow, 1959. Not rated.