HM4
Manual
A 3D horological motor crafted entirely by MB&F, featuring manual winding and dual parallel mainspring barrels. It offers a 72-hour power reserve, a balance frequency of 21,600bph (3Hz), and comprises 311 components with 50 jewels, plus a power reserve indicator.
Caliber Details
- Manufacturer
- MB&F
- Type
- Manual
- Frequency
- 21600 vph
- Power Reserve
- 72 h
- Jewels
- 50
- Display
- Analog
- Hands
- Hours, Minutes
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