Federico Caflisch

Federico Caflisch

Josef Karrer

Ignazio Consiglio

Sergio Rusca

Guido Avondet

André Morel

Roberto Serboli

Etiénne Lepicard

Grand Prix de Genève – 1931

Meyrin

Rabag-Bugatti Type 13

Rabag-Bugatti

Hans Theisen

August Frings

Rudolf Städtgen

H. Lauenstein

Eugen Winter

ADAC Eifelrennen – 1931

Duesenberg Alberti

Cooper Goldberg Brothers FD

Rigling Miller

Buick Butcher Brothers

Rigling Art Rose FD

Willys Jones-Miller

Duesenberg 122-30

Duesenberg A-240

Smith Empire State

Duesenberg Buckeye

Duesenberg Frame-Miller Duesenberg

Coleman FD

Miller Nutmeg State FD

Stevens Brisko-Atkinson FD

Miller All Oil

Miller Pedrick Piston Ring

Stevens Sampson

Duesenberg Maley

Snowberger Russell 8

Cooper Empire State FD

Miller Harry Miller

Summers Miller-Hartz FD

Morton & Brett – Engine

Curtis – Engine

Clemons – Engine

Morton & Brett

Coleman

Joe Huff

Eddie Burbach

George Wingerter

James Patterson

Charles Moran

Harry Butcher

John Boling

Marion Trexler

Bill Denver