From lipstick guns to pigeon cameras, here are ten of the strangest spy devices ever created, each a testament to the ingenuity (and oddness) of espionage.

• The Lipstick Pistol – A single-shot weapon disguised as makeup.

• The Shoe Transmitter – A bug hidden in a heel.

• Pigeon Cameras – Tiny cameras strapped to messenger pigeons.

• The Pipe Radio – An everyday pipe concealing a radio.

• The Bulgarian Umbrella – An umbrella modified to fire poison pellets.

• The Wristwatch Camera – Early mini-cameras hidden in a watch.

• The Coin Radio – A radio hidden inside a hollowed-out coin.

• The Buttonhole Camera – A tiny camera that peeked through a jacket.

• The Exploding Rat – A taxidermied rat concealing explosives.

• The Transmitter Rock – A listening device hidden inside a fake rock.