Ballpoint pen tip at the top
Outer diameter: 9.3 mmRim height: 0.60 mm
Spoke thickness: 0.20 mm
Rim width ~ 0.4 mm
Moment of inertia: ~14 mgcm2
For comparison, the Rolex 3135 movement (in the Submariner etc) balance wheel is 15 mgcm2 and the JLC 8 day balance wheel is 3.8 mgcm2.
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