1989 USGP at Phoenix multi-signed program.
This booklet has been signed & dated on the cover by Ayrton Senna in silver marker, and by Alain Prost in black marker (over his image in the Ferrari). Most programs are autographed inside, but as this one has been done on the cover it is easy to display / frame.
At that event Senna took pole and Prost won the race, both in the McLaren MP4-5b Honda.
These two World Champions did not sign much together!
This is of course accompanied by our certificate of authenticity.