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Mart Bailey

DC Sep 1939

Detective Comics #31

Detective Comics #31
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$53K
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$140K
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1st appearance of The Monk, Batman's first costumed enemy
1st appearance of Julie Madison, Bruce Wayne's girlfriend
5th appearance of Batman
Debut of the Batgyro, an airborn vehicle later replaced by the Batplane
Debut of the Batarang
Stories take place in New York City
National Fire Protection Association Jan 1950

Fire

Fire
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$25
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$75
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$250
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Promotional comic published by the National Fire Protection Association

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