Apple Lisa 2 front bezel prototype, measuring 17.75″ x 9″ x 1.5″, marked on the back: "PTA Prototype, 815 4116 A." The front features Apple's rainbow logo in the lower right, ventilation grille, and a single floppy slot—one of the primary differences between the Lisa 1 and Lisa 2, which replaced the error-prone dual Twiggy drives with a single 400K Sony microfloppy. In fine condition.