Advertising Poster Blueprint Great Western Railway Locomotive GWH3 Indirect Link Motion . Original antique poster featuring technical blueprint for GWR 3 Great Western Railway Model 4-6-0 Type Express Locomotive Indirect (Stephenson) Link Motion Gauge 5", displaying the valve, cranks, pump, axle, gauge, rocker, rods, straps, and rocker bearings, white drawing on blue background. Horizontal. Fair condition, creasing, staining, tears on edges. Country of issue: UK, designer: Unknown, size (cm): 50x74, year of printing: 1920s.