Retrospective: 1999-2000 Excelsior-Henderson Super X | Rider Magazine
Moto Excelsior MODEL 4TS 500CC 1 CYL IOE 2804 1914 a vendre - PreWarCar
Un retour à la production pour Excelsior-Henderson? - Moto Journal
Excelsior 1918 model 18 1000 cc 2 cyl ioe - Yesterdays
Elvin Shoemaker and his 1911 Excelsior — Archive Moto
Bonhams : Offered from the National Motorcycle Museum Collection, 1935 Excelsior 250cc Manxman Works Racing Motorcycle Frame no. M.E.T.T. 3 Engine no. BBAR 102