The Lionel Classic 51004 O Gauge "Baby Blue Comet" Train set from 1991. The reissue of the classic O Gauge Blue Comet set of the 1930s. The 263E 2-4-2 Locomotive features E-Unit reverse, two-tone blue paint, firebox glow and operating headlight. All 4 cars feature all-metal construction and feature illuminated interiors, number plates and removable roofs.