The plate that is part of a stylized composition in Carolyn Quartermaine's book, Carolyn Quatermaine Revealed, is from the artist's own collection. To her, the border color is the perfect turquoise.
[Styling by Carolyn Quartermaine, photo by Jacques Dirand from Carolyn Quatermaine Revealed, Rizzoli, 1997.]
She told me that she bought several of them in Norfolk, England at least 25 years ago but doesn't know anything about the manufacturer. We are posting an image of the back in hopes that someone might have a few guesses to share.
Please click the pictures above to enlarge.
[Carolyn Quartermaine, in Cote Sud France, photo by Martin Morrell.]