One koala (left) and two (right). Koala pieces usually have a suffix 'B' following the shape number but it appears on neither of these pieces. The bowl on the right is numbered just 24/11, and the one on the left is incorrectly numbered 24s (its size is actually24/11).
Shape book 'E'
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Diameter; 22 - 22.5 cm
24 Thought to be the earliest numbering, pre-dating suffixes.