{"query": "HM4", "brand": null, "total": 1, "limit": 10, "matches": [{"slug": "mb-f-hm4-thunderbolt-titanium", "brand": "MB&F", "ref": "HM4", "model": "HM4 Thunderbolt", "case_material": "Titanium", "url": "https://mostexpensivewatches.net/reference/mb-f-hm4-thunderbolt-titanium", "description": "The MB&F HM4 Thunderbolt was produced between 2010 and 2013, with the original titanium edition limited to 100 pieces. Collectors prioritize this reference for its unconventional aviation-inspired architecture, featuring two parallel jet-turbine pods crafted from Grade 5 titanium and a central sapphire section that requires over 185 hours of machining. The manual-wind HM4 engine consists of 311 components, utilizing two mainspring barrels to drive separate pods for time display and power reserve. This model marked a shift for the brand toward three-dimensional kinetic sculpture rather than traditional watch shapes. On the secondary market, the HM4 Thunderbolt typically trades in the low-to-mid six-figure range, often between $250,000 and $350,000 depending on condition. A notable variant is the HM4 \"Razzle Dazzle,\" which features hand-painted nose art on the titanium fuselage, further increasing its scarcity and value among specialized collectors.", "score": 198}]}