“Opa” (grandpa) is a popular term in the German Belt Area. It stands for
the German virtues: hard working, always being in time and tidiness. You
can rely on “Opa”. At the Wurstfest you will find the word on every corner. The
hosts call themselves Opa. They are recognizable by their red and green
vests, which are limited. Only 100 red vests exist. If you want to have one
you have to put on the green one first and wait until one of the Opa´s
leaves the society or dies.