Aluminium; 13x9 inches. Embossed Tin Offered here is a very rare pressed aluminum sign with a raised Bugatti logo. Close inspection reveals very minor flaws and a number pressed into the surface that reads 73AMOT173. RM Grade: 8. The tin Bugatti sign has bright colors and a glossy finish. The surface shows virtually no flaws, even at close range. RM Grade: 9.