Calibre
MB&F HM4
In 7 watches by MB&F
- Kind
- Hand-wound
- Beat
- 21,600 beats an hour (3 Hz)
- Power reserve
- 72 hours
- Jewels
- 50
- Watches from
- 2011 to 2014
Other MB&F calibres
- MB&F LM225 watches
- MB&F HM318 watches
- MB&F LM FlyingT14 watches
- MB&F LM10114 watches
- MB&F LM Perpetual13 watches
- MB&F HM910 watches
- MB&F HM69 watches
- MB&F HM28 watches
- MB&F LM18 watches
- MB&F HM107 watches
- MB&F HMX7 watches
- MB&F HM86 watches