The Prost–Senna rivalry was at its most intense during the period in which they were teammates at McLaren-Honda in the 1988 and the 1989 seasons. As teammates, Prost and Senna won 25 of the 32 races held during the 1988 and 1989 seasons. Senna had 14 victories and 26 pole positions, whilst Prost had 11 victories and 4 pole positions. On the other hand, Prost amassed 163 official (186 total) points, 25 podiums and set 12 fastest laps whilst Senna amassed 150 official (154 total) points, 18 podiums and set 6 fastest laps. They each won one World Championship - Senna 1988 and Prost 1989.

The helmet was hand-signed by Prost on the tear-off in black marker.