Penny Gold is a 1973 British crime film directed by Jack Cardiff and starring James Booth, Francesca Annis, Nicky Henson and Joss Ackland.

A police detective investigates the murder of a young woman, and discovers that the crime is connected to her surviving twin sister and an extremely valuable postage stamp.

True, the avuncular Napier rarely got into colour and never got the girl in the end (whereas James Booth, with a smile and a wink, and a pat of Francesca Annis' hand, does both); but the rest is familiar enough to set Edgar Wallace's bust revolving once again.

"[4] Time Out noted: "a brilliant opening sequence, otherwise this flat-footed British thriller is hampered by something like the world's worst script, including flashbacks no one would ever conceivably flash back to, and by a cumbersome storyline about big league stamp trading.

Jack Cardiff directs with obvious affection for a genre long past but it's hard on such distinguished players as Francesca Annis and James Booth not to have more meat on which to bite.