From the Silurian,Wenlock series,Homerian.
Collected from Dudley in Worcester,England.
This is a real oddball referred to as a spoon worm, but is actually related to Tentaculites,in fact it has also considered to be related to cephalopods,sea slugs and snails (Pteropoda) too!
Nobody seems to be quite sure what it is,academics still argue over it now!
This specimen is loose from Limestone matrix and measures 54.9mm a very good sized example.