The Rolex Bubbleback 3372, introduced in the 1930s (approx. 1933) and produced into the 1940s/50s, is a foundational automatic wristwatch featuring a distinctively protruding caseback to house early self-winding rotors.

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The Rolex Bubbleback 3372, introduced in the 1930s (approx. 1933) and produced into the 1940s/50s, is a foundational automatic wristwatch featuring a distinctively protruding caseback to house early self-winding rotors.