Not exactly my favorite Wallace flick!
The co-production with the British means there is more London flair than usual, but the heist film elements are all too comforting. Eddi Arent is extremely annoying as a West German tourist, he reminded me a lot of the idiot who is made fun of by Audrey Hepburn in "Charade". That's how the European neighbors saw the annoying Teutons!
Catherine Schell (later the sister-in-law of world star Hildegard Knef) and the ladylike Margot Trooger, who made a much more impression as the "Ringer"'s wife, also act disappointingly.
Ultimately, it's a matter of taste: for me, the film is a trivial, run-of-the-mill crime thriller; I miss the silly, scary atmosphere of the other West German Edgar Wallace films.