Well spotted Nige...
These sets are often desribed as being the "Egyptian Pattern," but there is nothing Egyptian about them.
The three 'pyramid' shapes are in fact a part of the landscape...
The Three Graces would perhaps be a better description...

?
Also, the trinket dish of this set has an intaglio profile of a MALE, unlike the other component pieces of this set.
These dishes are also lids of the pots upon certain examples of complete sets.
"COMPLETE" being a personal requirement at time of purchase,
as with like most so-called trinket sets, produced by most factories of the period... Walther included.
NYMPHEN and also PIERROT & PIERRETTE (for example) both had their trays introduced as stand-alone items and were made available long before any other component items for each were then produced...
John