Home Automotive Reference History Grand Prix Bugatti - Conway
Emilio Materassi at the pits at the Spanish Grand Prix: the car still has small brake drums, and the tyres are once more Dunlop.

Chapter 8: 1927 and the Type 35B
Page 83, fig. 8-4: Emilio Materassi at the pits at the Spanish Grand Prix: the car still has small brake drums, and the tyres are once more Dunlop.