Clypeus Ploti "Chedworth bun"

Clypeus Ploti (Salter).
From the jurassic bajocian stage inferior oolite.
Collected from Wyke Rissington, Gloucestershire,England.
Loose from inferior oolite matrix ,this is a classic Cotswold's sea urchin, locally known as a "Chedworth Bun".
The display side is absolutely pristine,and looks fantastic,and on the reverse there are two small patches missing,other than that its in beautiful condition!
The Echinoid measures 92mm