The Door With Seven Locks - 1940 - 6/10

The dying lord is to be buried in the family vault – with his jewels.
A faithful friend is entrusted with the seven keys.
Ten years later, a distant relative is summoned, a retired detective takes an interest.
While the seven keys are, of course, gone!
Edgar Wallace chamber thriller dashes from the gate and rarely slows down.
Duplicitous servants, hidden panels, death pact, even a monkey.
Leslie Banks, ever flamboyant, with Lillie Palmer, as the distant heir.