BrickLink - Gear 4205759b : LEGO Harry Potter Poster, Chamber of Secrets Series, later, includes 4719 and 4720 on back, Lego Logo on Right [Poster:Harry Potter:Chamber of Secrets] - BrickLink Reference Catalog
LEGO® Hogwarts Castle (4842): all details
LEGO Harry Potter Professor McGonagall Minifigure Dark Green 4842 Cape Genuine | eBay
LEGO Set 4842-1 Hogwarts Castle (2010 Harry Potter) | Rebrickable - Build with LEGO
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LEGO 4842 Harry Potter Hogwarts Castle | BrickEconomy
LEGO 4842 Harry Potter Hogwarts Castle | BrickEconomy