Does this shape appear in other series?  Yes - Later Series 83-L is similar judging by its shape-book details although no example is recorded. The same shape also appeared in another Kerryl series, the 'M' Series (see below)

The shape number is amongst those listed on a surviving price-list that is dated October 1952. In 1952 the Remued Later Series was still in production and would continue for another four years after that alongside the 'A' Series.

Height; 5 - 5.5 cm.

A1 small ramekins, left;   A2 large ramekins, right.

Together these are the most plentiful 'A' Series pieces found today.

The same shape also appears in another Kerryl numbering series, the 'M' Series, numbered M17.

The 'M' Series is entered after the 'A' Series in the same shape book.

Black exterior. Bases signed Kerryl M17. (A2 ramekins are just signed A2 - no 'Kerryl')