1964. No Edition Remarks. Unpaginated. No dust jacket. Beige cloth. Colour illustrated plates for testing colour blindness. Light tanning to plates; pages are black so any tanning or foxing is hidden. Binding is slightly loose but pages remain attached. Boards have minor corner bumping and edgewear with mild tanning and scuffing overall. Spine has light tanning with soft crushing to ends. Book has a slight forward lean. Mild holing and splitting to joints.