“Professor Calthrop, actuated only by scientific motives, and his assistant, out for his own gain, have invented a system for the manufacture of diamonds.” - BFI.

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Main Cast: Noel Madison, James Stephenson, Lesley Brook, Wilfrid Lawson, George Galleon, Renee Gadd, Philip Ray, Hector Abbas, Wally Patch, J. Fisher White

Director: Ralph Ince

Writer:

Editor:

Cinematographer: Basil Emmott

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