German Cervelatwurst is made of finely ground beef and pork. This type of sausage is very popular in Germany, as it is delicate, mild in taste and easy to slice.
This is a Cervelatwurst named after a sausage-producing area in Central Germany (Thueringen). In the US-Midwest, where many Germans settled, dozens of Cervelat sausages of this kind are still made today.
Holsteiner Wurst is a Cervelatwurst from northern Germany (county of Schleswig-Holstein). It is heavily smoked.