Comic showing Batman's debut

 sells for $1m!

The comic book cover is one

 of the most famous of all time

A comic showing the debut of superhero Batman has been sold for more than $1m (£655,000) at an auction in Dallas.

The rare 1939 copy of Detective Comic No 27 was bought by an anonymous bidder from a seller who also wished to keep their identity secret.

The sale comes just days after an early edition of a Superman comic sold for $1m - only to be outdone by Batman.

Barry Sandoval, of auction house Heritage, claimed it was the biggest price on record for a comic book.

Mr Sandoval added that the cover of the comic - which was bought by the seller in the 1960s for $100 (£65) - is one of the most famous in comic book history.