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:Bridgestone HurricaneExcelsior HendersonPuch 250 SGS / Allstate SR 250Moto Shifty 900Henderson FourCoventry EagleArdie BergfreundCrocker V-twin Small Tank