Asta

Asta was a wire-haired terrier that appeared in several American films from 1934 until 1938, most notably in The Thin Man series. After 1938 other wire haired terriers were used in The Thin Man films, however the name "Asta" was retained.

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  from the trailer for After the Thin Man (1936)
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  from the trailer for Another Thin Man (1939)
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  billed as "Mr Atlas" for the film Topper Takes a Trip (1939)
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  from the trailer for Shadow of The Thin Man (1941)