Excelsior Wooler Flat Four Wooler Flat Four SPECIFICATIONS, PRICE & IMAGES Manufacturer: Wooler Model: Flat Four Engine: 500cc Year: 1955 Decade: 1950s Machine Type: Road Bike Features More Bike Specifications:Kreidler Florett RSCushman Super EagleScott Flying SquirrelCrocker V-TwinBrough Superior SS100Rudge SpecialMoto Shifty 900Crocker V-twin Small Tank