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JEFFERIES QUARTERDECK SERVES AS EXCLUSIVE FINANCIAL ADVISOR IN C$391.5-MILLION SALE OF CMC ELECTRONICS, AN ONCAP PORTFOLIO COMPANY, TO ESTERLINE TECHNOLOGIES

NEW YORK – Feb. 1, 2007 — Jefferies & Company, Inc., the principal operating subsidiary of Jefferies Group, Inc. (NYSE: JEF), today announced that its aerospace-and-defense investment banking group, Jefferies Quarterdeck, has served as exclusive financial advisor for the sale of CMC Electronics to Esterline Technologies Corp. (NYSE: ESL) for a value of approximately C$391.5 million. CMC, based in Montreal, Quebec, is a portfolio company of ONCAP, the middle-market investment fund of Onex Corporation (TSX: OCX), one of Canada’s largest companies with annual revenue in excess of approximately C$20 billion. Jefferies Quarterdeck has completed more than 40 aerospace-and-defense transactions totaling over $8 billion in value in the last 12 months.

CMC Electronics is a world-class leader in the design, manufacture, sales and support of high-technology electronic products for the commercial and military aviation market. Seattle-based Esterline is a leading world-wide supplier to the aerospace-and-defense industry specializing in three core areas: Avionics & Controls, Sensors & Systems and Advanced Materials.

“This transaction demonstrates our ability to leverage our strong industry relationships with senior executives in the aerospace and defense marketplace to find the best long-term partners for our clients, helping to ensure their future growth,” said Michael J. Richter, Co-President of Jefferies Quarterdeck and Head of the firm’s Aerospace & Defense Investment Banking Group. “In fact, this transaction is another example of our continued commitment to provide industry-leading investment-banking services and market-specific knowledge to leading companies in the global, aerospace, defense, government IT and homeland-security sectors, where we are currently ranked the #1 M&A advisor by Securities Data Corp.”

Illustrating its leadership in the aviation and global-positioning markets, CMC Electronics’ cockpit avionics products include state-of-the-art flight management systems, GPS receivers, mission computers, enhanced vision systems and satellite-communications systems.

About Jefferies

Jefferies, a global investment bank and institutional securities firm, has served growing and mid-sized companies and their investors for 40 years. Headquartered in New York, with more than 30 offices around the world, Jefferies provides clients with capital markets and financial advisory services, institutional brokerage, securities research and asset management. The firm is a leading provider of trade execution in equity, high yield, convertible and international securities for institutional investors and high net worth individuals. Jefferies & Company, Inc. is the principal operating subsidiary of Jefferies
Group, Inc. (NYSE: JEF; www.jefferies.com).

Jefferies Quarterdeck, the aerospace and defense investment banking group of Jefferies & Company, Inc., is focused on providing a full range of investment banking services to companies in the global aerospace, defense, federal IT and homeland security sectors. Jefferies Quarterdeck combines deep industry knowledge and M&A expertise with Jefferies' outstanding debt and equity financing, restructuring, trading and research capabilities. The firm’s clients include top government contractors, aerospace and defense companies, leading homeland security companies and private investment firms with related portfolio companies. In 2006, Jefferies Quarterdeck worked on more than 40 transactions valued at more than $8 billion, a level of activity that ranks the firm No. 1 in M&A in this area. To date, Jefferies Quarterdeck continues to rank as the No. 1 M&A advisor to the global aerospace and defense sectors, according to Securities Data Corp., based on number of reported defense-related M&A transactions in North America and Western Europe. For more information, please visit www.jefferies.com/jq.

CONTACT:

Jefferies:
Tom Tarrant
(203) 708-5989
ttarrant@jefferies.com

Cubitt Jacobs & Prosek:
Mark Kollar
(212) 279-3115/ Ext.201
mark@cjpcom.com