Mecochirus sp. & Sccocoma sp.
A fossil preserving the crustacean Mecochirus and the planktonic sea lily Saccocoma from the Solnhofen limestone in Germany.
Purchased at a fossil shop near Hotel Linden Hof where I stayed in Mörnsheim. The key point was that two types of fossils were preserved on the same matrix.
I thought 20 euros was cheap.