Harry Winston Diamond Corporation Debuts on the NYSE

    NEW YORK, Nov. 19 /CNW/ - Harry Winston Diamond Corporation, formerly
known as Aber Diamond Corporation (NASDAQ:   ABER; TSX: ABZ), today announced
that its securities have begun trading on the New York Stock Exchange (NYSE)
under the ticker symbol "HWD." Harry Winston Diamond Corporation will also
continue to trade on the Toronto Stock Exchange under the new ticker symbol
"HW." Trading in the company's common stock on NASDAQ ceased at the close of
market on Friday, November 16, 2007.
    In addition, beginning today, the company will operate under the name
Harry Winston Diamond Corporation.
    "The exchange is privileged to welcome Harry Winston, a leading luxury
brand and the world's largest publicly traded diamond company, to our family
of companies listed on the NYSE," said John A. Thain, Chief Executive Officer
of NYSE Euronext. "We look forward to providing Harry Winston with the
superior services, liquidity and brand visibility associated with listing on
the NYSE."
    "We are excited that Harry Winston Diamond Corporation is now listed on
the NYSE. This new listing and our new name represent the beginning of the
next successful chapter for our company," said Robert Gannicott, Chairman and
Chief Executive Officer of Harry Winston Diamond Corporation.

    About Harry Winston Diamond Corporation

    Harry Winston Diamond Corporation (NYSE:   HWD; TSX: HW) is a specialist
diamond enterprise with assets in the mining and retail segments of the
diamond industry. The company supplies rough diamonds to the global market
from its 40% interest in the Diavik Diamond Mine, located in Canada's
Northwest Territories. The company's retail division, Harry Winston, Inc., is
a premier jewelry and timepiece retailer with salons in key locations
including New York, Paris, London, Beijing, Tokyo and Beverly Hills. For more
information, please go to www.harrywinston.com or for investor information,
visit investor.harrrywinston.com.

    Complete press kit available at www.harrywinston-press.com/nyse-hwd

    %SEDAR: 00003786E

For further information:

For further information: Nancy Murray, nmurray@harrywinston.com, (646)
778-5897; or Kelley Stamm, kstamm@harrywinston.com, (416) 205-4380

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