Movement
Calibre 6641
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Lignes
11.5
Mounting Diameter
25.6
Thickness
4.3
Frequency (vph)
28,800
Jewels
25
Power Reserve
40
Hand Sizes
1.50, 0.90, 0.21
Complication
Center Seconds
Power
Automatic
Shape
Round
Size
Large
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Notes
The 6641 is a direct derivative of the 430 and is essentially identical to that moment in structure apart from the gear train and balance having been modified for 28,800vph instead of the 430's 36,000 vph. It was also made in a 17 jewel variant which was called the 6642.
6641: Center Seconds, 25 Jewels
6642: Center Seconds, 17 Jewels
6651: Center Seconds, Date, 25 Jewels
6652: Center Seconds, Date, 17 Jewels