Avengers #4 CGC 3.0
Serial: 3786140009
Cream to Off-White Pages
3/64
Key:
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Captain America joins the Avengers
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1st cover appearance of Captain America on an official Marvel Comics cover, previously Timely, then Atlas
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1st appearance of Captain America in the Silver Age
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Death of Bucky, in a flashback
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1st cameo appearance of Baron Heinrich Zemo