Delphis 91 A F? Identification

I bought my first Poole piece last weekend. I love it!
I was told it was 70s but I can't find the mark online to identify the painter. Can anyone help?

https://www.20thcenturyforum.com/t4200-poole-pottery-up-to-1959-traditional?highlight=poole
https://www.20thcenturyforum.com/t4200-poole-pottery-up-to-1959-traditional?highlight=poole
https://www.20thcenturyforum.com/t4201-poole-pottery-1980-to-present-day?highlight=poole

No doubt someone will be along to tell you. Meanwhile we have a huge amount of Poole info on our 3 threads above

Yes it looks 1970s, but I can't see that mark in the book.

The delphis on the forum is mainly in these two threads:

https://www.20thcenturyforum.com/t14997-poole-pottery-1960-1980-part-one
https://www.20thcenturyforum.com/t17933-poole-pottery-1960-1980-part-two

I searched the threads before asking and also looked on another specialist Poole site. Thank you for trying to help.
Might it be Andree Fontana even though the AF looks different than the one I've seen accredited.

Andree had many styles when signing

Thank you for that.