| Manufacturer | MB&F |
| Caliber Number | LM101 |
| In-House? | Yes |
| Type | Manual wind |
| Jewels | 23 |
| Number of Parts | 229 |
| Power Reserve | 45 hours |
| Vibrations Per Hour | 18,000 bph (2.5Hz) |
| Functions | Hours, minutes, power reserve indicator |
| Features | Finished by hand, hand-engraved, frosted finish, gold chatons and polished countersinks, 14mm balance wheel floating above the dial |
| Country of Manufacture | Switzerland |
| Known Models | Legacy Machine 101 |
MB&F Legacy Machine No. 1 caliber in the MB&F LM101 Frost watch announced April 16, 2015.
Bespoke 14mm balance wheel with four traditional regulating screws floating above the movement and dials.
The smaller in-house LM101 is not to be confused with the MB&F caliber LM1, which was developed in collaboration between MB&F’s own engineering team and other watchmaking friends. The best way to distinguish the two is that the LM101 (seen here) has a single time zone and the LM1 has dual time zones.
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