Does this shape appear in other series? No - (none recorded in image database)
It is found with an unusually wide variety of handle styles.
Height; 10.5 - 12 cm
Collection; Brenton Roneberg
Shape book 'E'
The same dimensions with a similar sketch also appear in shape book 'C', which is older than book 'E'. Above that entry however, faint and crossed-out, is another set of dimensions with no sketch, as follows;
H 4 5/8
W 5 1/4 1 lb 4 oz
These raise the possibility that there was an earlier 185 shape, as yet undiscovered. (Alternatively it may just represent an initial concept for the 185 jug, subsequently revised.)