6 3/4''' | Automatic | Swiss Lever | Sweeping Seconds | Remarks: Movement family: Omega 660: 19,800 bph, fixed hairspring stud-holder, 17 jewels Omega 661: 19,800 bph, fixed hairspring stud-holder, 24 jewels Omega 662: 21,600 bph, mobile hairspring stud-holder, 17...
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