Based both on Rufus King's 1929 mystery and the play adapted from it by Charles Beahan, Murder by the Clock concerns an old woman who has a horn installed in her crypt in case she is buried alive. She is soon murdered, strangled. The her alcoholic nephew is murdered, also strangled. The the horn from the crypt sounds. The movie's tagline is "Three murders done -- but only two persons die!" Luckily, Lt. Valcour is on the case as he matches wits with a very clever murderer.
Murder by the Clock was directed by Edward Sloman, from an adaptation by Henry Myers. It features William "Stage" Boyd (not to be confused with William "Hopalong Cassidy" Boyd) , with Lilyan Tashman, Irving Pitchel, and Regis Toomy.