So, the full set of 120 Derwent Artists Pencils. These, as far as I understand, are the British equivalent of the USA Sanford Prismacolor Pencils. Both have wax as the binder & according to Gildow & Newton's "Colored Pencil Solution Book" the Derwents differ in that: they are of medium hardness rather than soft; the lead & pencil diameters are slightly larger (1mm max); there is no blender pencil; they are sold presharpened. I sat last night happily making myself a colour chart.
(click on photos to enlarge)