The Head Man

An executioner in Nazi Germany decides to steal the heads of his state-sanctioned victims.

"His name was Otto Krantz, and he was the greatest actor in Berlin. And was not Berlin the capital of the entire reasonable world?"

15 Mystery Stories (June 1950)
Chamber of Horrors (1966)*
Such Stuff as Screams Are Made Of (1979)*
Complete Stories of Robert Bloch -- V 1: Final Reckonings (1990)

* as "The Head Hunter"