John Watson 1977 Argentinian GP signed and mounted original pencil sketch

A superbly detailed original hand drawn pencil sketch of John Watson driving his Martini Racing Brabham Alfa Romeo at the 1977 Argentinian GP. The sketch has been signed by Watson to the mount and by the artist to the sketch itself. The drawing is supplied double mounted in its original packaging with the artist’s certificate of authenticity showing Watson signing. Dimensions are 11″ x 14″. Reference: PRI-DJJWARG77-01