Crown Lynn 'toby' jugs in four sizes

Here are some of my favourite CL jugs, named Toby jugs in the documentation.

From left, we have
Hand painted, no markings on the base except the shape number and size 709-3  (the 3 denotes the size).  It is 13.5 cm high.
Devon Maid Ware, 709-2, 11.5 high
(front) a tiny shiny brown jug, 6.5 high.
(back) an older yellow body jug, 9.5 high.

Here is the wee brown 6.5 cm jug - an interesting glaze but the base for sure looks like Crown Lynn.


And here is my 9.5 cm yellow jug (this size is quite common in the yellow/greyish early clay bodies.)

I found one of the smallest jugs today.... I have never seen that size before. I have a bigger version but this one I got today is very cute.
Blue stripe is different too, I've seen green or red but not blue.

YUM Jan. What is on the base?

BackStamp as below... it looks like the jug has been near excessive heat.. and a small chip .... but I still love it.