Reference
MB&F Legacy Machine Perpetual
Reference 03 · 18k White Gold
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About this reference
The MB&F Legacy Machine Perpetual in 18k white gold with a purple dial (Reference 03.WL.P) was released in 2018 as a limited edition of 25 pieces. Collectors prioritize this reference for its caliber, developed by Stephen McDonnell, which replaces the traditional grand levier system with a mechanical processor. This architecture prevents date-skipping errors and allows for independent adjustment of the year and month. The movement features a suspended 14mm balance wheel positioned above a skeletonized dial, showcasing the perpetual calendar complication. The 44mm case is constructed from 18k white gold and houses a 581-component manual-wind movement with a 72-hour power reserve. On the secondary market, this specific purple dial variant typically trades in the mid-to-high six-figure range, often exceeding $180,000 depending on condition. A notable auction result occurred in 2022 when a white gold example reached approximately $200,000 including buyer's premium.
Auction track record
2 documented sales since 2018. Top hammer $157,513 at Christie's Geneva in 2025. Median hammer: $41,666.
Ranks #5 of 26 MB&F auction lots we track — see all MB&F records.
All documented hammer prices
For this reference (and close variants).
| Lot | Year | Hammer | Venue |
|---|---|---|---|
| 03.WL.P · Legacy Machine Perpetual | 2025 | $157,513 | Christie's Geneva |
| 31R0032 · Horological Machine No. 3 'Sidewinder' | 2018 | $41,666 | Bonhams Hong Kong |
About this reference
MB&F's Legacy Machine Perpetual (03) is a 18k white gold reference in the MB&F lineup. Browse all MB&F inventory or set a price alert to be notified when a new example lists.