I browsed a bit online and found out that these were made a short period only:1973-1988 and take 3-4 eggs, you could probably use it for serving other things, like jam, pickles or olives as it is as big as a jam jar.

The coddler is marked underneath and looks as good as new.

Please browse the pictures, the last picture is with a normal size coddler, which is not included in this sale.