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Superman Issue 1 | Superman #1 | Superman 1 Value // …
The First Issue of Superman Just Became the Most Valuable Comic Book …
Mile High Copy of Superman #1 Sells for Record $5.3 Million
Action Comics 1 - Wikipedia
Rare Superman comic sells for record $3.25m - BBC
GCD :: Issue :: Superman #[1] - Grand Comics Database
Superman (comic book) - Wikipedia
SUPERMAN #1 | DC
Mile High Copy of “Superman #1” Sells for Record $5.3 Million
Superman #1 - GoCollect