Can anyone identify this blue transferware pattern?

I bought it on impulse, thinking I recognised it as early Spode. I've searched and searched but can't find it.

 

Greetings! Is there a rim edge design not included in your picture? Please also show a picture of the underside, marked or not.

 

Hello! There's no rim edge, as the image is taken from the inside of a planter/footbath. No marks, I think it's early nineteenth century.

 

Here is its base

 

It does look early as heck, might even be late 18th. I don't think Spode.

 

I found this: https://www.ebay.co.uk/itm/Antique-...Soup-Tureen-Stand-c1830-17-inch-/353182298469

 

That's fantastic, Janet - thank you so much!

 

Here is all that's in Coysh & Henrywood, just a picture in the unattributed section.

 

Thank you! I was just about to order a copy; I won't bother now.

 

I'm curious to know if your piece would fit on the one they call a soup tureen tray?
Also if anyone knows why they would think it's a tureen tray and not just a platter.