21 cm Arnioceras ammonite bed, from Charmouth beach, Jurassic coast

A rare piece filled with Arnioceras sp. ammonites measuring 21 cm across it's widest point. 
 
No repairs or restoration, 
 
 
Lower Sinemurian, Black Ven Mudstone Member, Charmouth Mudstone Formation, Charmouth, Dorset. 195 MYA