Banana Ballpoint

design for a ball-point pen to be the same size as a banana, in plastic with soft rubber skin, and in bold natural colour, technicolour preferably.
based on the observation that a ‘peeled’ banana is good functional shape for writing—not unlike a quill pen nor much like one either.
1st step is to make a prototype, use a real peeled banana and standard ball-point refill, then 4” × 5” photograph.
6 November 1971

Page 28v and Page 29r, Sketchbook 3, Daler Spiral Bound Sketchbook, 1967-71. Coloured pencil and pen on paper, 250 x 175 mm. DMC 2662.28v-29r.