Pebble Beach Concours d'Elegance 2004 Poster 23 x 25 (William Motta autographed?

Description

2004 Pebble Beach Concours d'Elegance Poster, 23 x 25 (autographed?)
Acquired a collection of posters in Monterey, but I cannot authenticate autographs of the late William A Motta of Road & Track
But, I suspect it's really his signature based upon poster's location, and that I still have the paper wrap and Pebble Beach Concours d'Elegance black poster ribbon.  (the paper and ribbon will not be included since I have only 2 sets of these)
Please see all 3 signature photographs, as the autographs are unique to the poster.
I will do my best to answer any questions.
Posters are in nice condition, too.
Condition is Used. Shipped with USPS.