Getting harder to obtain, shells from the Barton beds of Barton on sea in Hampshire. This is located on the south coast of the UK near the Isle of Wight. The shells date to around 45 million years old but they all come with full details.
Now very difficult to get hold of and impossible to dig I have a good selection of New Forest shells available. Located in the south and spreading into two counties the shells are aged around 40 million years old.