The signature was from an autograph book.
original Geoff Duke Signature Framed Picture Photograph Gilera Motorcycle Racer
GEOFF DUKE ISLE OF MAN TT MOTORCYCLE RACING MOTORCYCLIST 1951 ORIGINAL PHOTO
GEOFF DUKE. ORIGINAL AUTOGRAPH ON PRINT PLUS POSTCARD
The TT as Geoff Duke Sees It 1951 Original Pamphlet
