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Castanet-telegraph

Esperanza operates the castanet telegraph while dancing at the Mira Loma cantina.

Communication apparatus disguised as a pair of castanets.

The castanets are clicked in Morse Code and the signal received by a similar device at CONTROL Headquarters.

Castanet-receiver

The castanet receiving device at CONTROL Headquarters.

Used by CONTROL agent Esperanza while undercover as a dancer at the cantina in Mira Loma, Mexico.

[Episode #103: "Tequila Mockingbird".]