Reference
MB&F Horological Machine No. 5 (HM5)
Reference 55R339 · 18k Red Gold and Titanium
Track MB&F 55R339
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About this reference
The MB&F Horological Machine No. 5 (HM5) RT, reference 55.RTL.B, was released in 2013 as a limited edition of 66 pieces. This reference features an outer case constructed from 18k red gold and grade 5 titanium, housing an internal water-resistant engine container. The movement is a Girard-Perregaux based caliber modified by Jean-François Mojon and Vincent Boucard, featuring a 22k gold battle-axe rotor and a jumping hour mechanism. Time is displayed via bi-directional jumping hours and minutes on sapphire crystal discs, which are projected 90 degrees vertically through an optical grade sapphire prism. The case design includes functional louvers operated by a slide to allow light to charge the Super-LumiNova on the discs. On the secondary market, this reference typically trades between $55,000 and $75,000. It followed the original 2012 zirconium version and preceded the final CarbonMacrolon edition, marking a significant material evolution in the HM5 series.
Auction track record
1 documented sale since 2023. Top hammer $40,320 at Christie's Dubai in 2023. Median hammer: $40,320.
Ranks #23 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 |
|---|---|---|---|
| 55R339 · Horological Machine No. 5 (HM5) | 2023 | $40,320 | Christie's Dubai |
About this reference
MB&F's Horological Machine No. 5 (HM5) (55R339) is a 18k red gold and titanium reference in the MB&F lineup. Browse all MB&F inventory or set a price alert to be notified when a new example lists.