The Ace of Scotland Yard
"The FIRST TALKING SERIAL!"
From the Universal synopsis: Retired Inspector Blake of Scotland Yard learns that Lord Blanton has acquired the sacred "Love Ring"---a cursed jewel that has brought grief to its previous owners. Prince Darius seeks to obtain the ring, and the mummy of a princess of an ancient country to return them to his homeland.
Directors: Ray Taylor
Writers: Harold M. Atkinson
IMDB: tt0019620