Does this shape appear in other series?  Yes -   'A' Series / Kerryl A105 is like 57, and according to a shape book  'A' Series / Kerryl A99 is like 57-L.   'A' Series / Kerryl A29 is also like 57 although not identical.

   Height; 26 cm.  These are big!

   There is an unconfirmed report of an example in this size incised not 57-L but 57-12