George Nelson and Robert Propst Action Office roll-top desk, by Herman Miller. Wall-mounted, walnut tambour top, laminate desk top. Four interchangeable drawers; 2 black and 2 additional deep drawers in striking tangerine and sky blue. Herman Miller label. Original wall mounts missing. 48"w x 24"d x 15"h. Very good original condition. USA, 1960s. SOLD 
Image: George Nelson from the Herman Miller archives.