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The Omega 28.9 Chronograph was Omega's first small wrist chronograph. Introduced in 1932, production continued until 1943. The watch paved the way for Omega to become one of the most successful manufacturers of Swiss made wrist chronographs. ==Introduction== The calibre 28.9 was introduced as Omega SA watches' first production wrist chronograph in 1932 featuring 17 rubies, Bregeut balance and continuous minute hand.〔Richon, Marco (2007). A Journey Through Time. Omega Ltd. P.530. ISBN 9782970056225〕 Lemania produced the watch for the most part under license when it joined SSIH for Omega and it was made in very small numbers for a little over ten years. Omega SA produced three main types of the calibre 28.9 movement: T1, which utilized a single pusher T2, which utilized two pushers T3, which again utilized twin pushers The movement was manual wind. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Omega 28.9 chronograph」の詳細全文を読む スポンサード リンク
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