10 cm Oistoceras sp. Macroconch ammonite - Charmouth Beach, Jurassic coast

A unusual Macroconch Oistoceras sp. ammonite measuring 10 cm across it's widest point - found on Charmouth beach. 
 
No restoration or repairs.
 
Lower Pliensbachian, Stonebarrow Marl Member, Charmouth Mudstone Formation, Green ammonite beds.
190 MYA