Heath Ledger is documented wearing the Casio Collection. Each watch below links to its strap size and story.

Casio Collection 2008

Film role: as the Joker in The Dark Knight he wears a Casio CA-53W calculator watch. Personal ownership is not documented.

18 mm

Most common strap size on this line: 18 mm

Source: webChronos (Chronos Japan)

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