A48  ('A' Series / Kerryl)    Coffee cup and Plate.
Does this shape appear in other series?  No -  (none recorded in image database)
Known only from this shape-book sketch. No numbered example is recorded.

Dimensions (from shape book); cup height about 5.5 cm, plate diameter about 15 cm.

Shape book 'A' (back)
Allan & Myrtle James Collection
Bases unmarked, but possibly an example of A48? The dimensions do match.
Cups 5.5 cm high, plates 14.2 cm diameter.