RARE Promicroceras precompressum Honey Calcite

Promicroceras precompressum (Spath)
From the Jurassic,Upper Sinemurian stage,Obtusum chronozone,SN33.
Collected from,Black Ven,Charmouth,Dorset,England.
An absolutely Sumptuous, Dark Honey calcite ammonite, on the top right side, of this base cut Mudstone matrix.
One of the Rare very large and ventrally flattened species of Promicroceras.
The ammonite measures a large 28mm and including the matrix is 120mm x 117mm.