Possible Conta & Boehme? A little help- pretty please?

Hello from Merry Olde England!
I picked up these little beauties from a car boot (think flea market).

They are unmarked, and about 14.7 cm or just shy of 6 inches tall. After hours of online research, I think I have narrowed it down to Conta & Boehme. If anyone here has the Conta & Boehme book by the Vogels or the old Conta & Boehme catalogue and is willing to have a look. Please, please, get in touch.

The lady who sold them to me told me all she knew about them was they were old. They belonged to her mother-in-law (aged 96) who they have had to move into a nursing home. They were clearing her house out and just couldn't keep everything.

I've looked into getting a copy of the Conta and Boehme Porcelain Identification and Value Guide myself but with international shipping it's upwards of $70! So, I'm trying here first before shelling out the funds. Really hoping you all can help.