{"reference": {"slug": "richard-mille-rm009", "brand": "Richard Mille", "ref": "RM009", "model": "Felipe Massa Tourbillon", "case_material": "Alusic", "provenance": "extracted_from_auction_comps", "url": "https://mostexpensivewatches.net/reference/richard-mille-rm009", "description": "The Richard Mille RM009 Felipe Massa was introduced in 2005 as a limited edition of 25 pieces and is no longer in production. Collectors prioritize this reference for its historical role in establishing the brand’s focus on extreme lightweight engineering and shock resistance. The case is constructed from Alusic, a metal matrix composite of aluminum and silicon carbide used in aerospace and satellite manufacturing, which provides high rigidity and low density. It houses the Caliber RM009, a manual-wind tourbillon movement featuring a baseplate made of ALUSIC and lithium-aluminum alloys. At its release, the watch weighed approximately 29 grams excluding the strap, making it the lightest mechanical watch of its era. On the secondary market, the RM009 typically commands prices in the mid-to-high six-figure range. A notable production detail is that the Alusic material is exceptionally difficult to machine, contributing to the reference's limited production run."}, "listing_stats": {"count": 0, "median": 0, "low": 0, "high": 0}, "listings": [], "auction_lots": [{"slug": "richard-mille-rm009-af-2014", "brand": "Richard Mille", "reference": "RM009 AF", "model": "Felipe Massa Tourbillon", "case_material": "Alusic", "hammer_usd": 298584, "year_sold": 2014, "venue": "Christie's Hong Kong", "lot_summary": "A rare tourbillon cased in Alusic, a high-tech metal matrix composite used in aerospace applications.", "source_url": "https://www.christies.com/en/lot/lot-5851230", "provenance": "ai_generated_grounded", "url": "https://mostexpensivewatches.net/auctions/richard-mille-rm009-af-2014"}]}