18K CUSTOM
ATELIER TECHNICAL DOSSIER

Geneva Custom Atelier Engineering Journal — 5-Axis CNC Cases, Gibeon Meteorite Dials & Hand Anglage

Editorial Mission & Quantitative Standards: The 18K CUSTOM Research Journal publishes original, laboratory-verified horological monographs documenting 75.0% pure Solid 18-Karat Gold (Au750) and 95.0% pure Platinum (Pt950) watchmaking. Every article contains structured reference data tables, calibrated Mettler-Toledo 0.01g mass measurements, Fischer XRF elemental spectra, and 6-position Witschi Chronoscope X1 benchmarks. Return to the 18K CUSTOM Homepage Master Register or browse the Complete 774-Timepiece Catalogue.

Master Index of Published Horological & Metallurgical Monographs (18K CUSTOM)
#Published Monograph & Technical GuidePrimary Brand FocusPublication DateLead AuthorDirect Dossier
015-Axis Swiss CNC Milling Solid 18K Gold Watch Cases (±2um)Audemars PiguetSebastien RochatRead Monograph →
02Authentic Gibeon Meteorite Watch Dials & Widmanstatten EtchRolexSebastien RochatRead Monograph →
03Hand-Chamfered Openworked Skeleton Bridges & Interior AnglageAudemars PiguetSebastien RochatRead Monograph →
04Custom SW Dials, Buff Hands & Double-AR Deep Crystal OpticsRolexSebastien RochatRead Monograph →
05Bespoke VVS Baguette Diamond & Sapphire Setting in 18K GoldPatek PhilippeSebastien RochatRead Monograph →

Featured Horological Research Monographs (100% Original Laboratory Editions)

Swiss 5-axis CNC diamond micro-milling spindle carving an octagonal watch case from a solid 18K rose gold billet
• 9 min read • By Sebastien Rochat

5-Axis Swiss CNC Machining of Solid 18K Gold Watch Cases: ±0.002mm Micron Tolerances & Hydrostatic Sealing

Milling a waterproof luxury watch case and integrated bracelet from a solid forged 18K gold (Au750) billet requires simultaneous 5-axis Swiss CNC machining centers (such as Willemin-Macodel 408MT) operating at 42,000 RPM with monocrystalline diamond (MCD) cutters to hold ±0.002 mm (2-micron) gasket-seat tolerances and crisp architectural bevels.

Raw crystalline slice of Namibian Gibeon iron meteorite beside a finished Widmanstatten meteorite watch dial in a solid 18K rose gold case
• 9 min read • By Sebastien Rochat

Authentic Namibian Gibeon & Muonionalusta Meteorite Watch Dials: Wire-EDM Slicing, Nitric Acid Widmanstatten Etching & Rhodium Sealing

Genuine horological meteorite dials are sliced via submerged Wire-EDM to 0.45 mm thickness from prehistoric IVA fine octahedrite iron-nickel meteorites (Gibeon and Muonionalusta) that cooled at 1°C per million years in deep space, then etched in dilute nitric acid (HNO3) to reveal interlocking kamacite and taenite Widmanstatten crystal lamellae that cannot be synthesized on Earth.

Master watchmaker hand-polishing the mirror anglage bevels of an openworked gold skeleton movement bridge with gentian pegwood under a microscope
• 8 min read • By Sebastien Rochat

The Art of Hand-Chamfered Openworked Skeleton Bridges: Interior Angles (Angles Rentrants), Gentian-Wood Polishing & Rhodium Plating

True haute horlogerie skeletonization (openworking) removes up to 65% of a movement's German-silver or solid-gold bridge mass via micro-EDM while preserving torsional rigidity, followed by 18 to 35 hours of manual 45-degree bevel filing, diamond-paste lapping, and gentian-wood polishing to create sharp inward V-corners (angles rentrants) that no rotary CNC cutter can form.

Custom watchmaker brass tray holding turquoise, lapis lazuli, malachite, and tiger eye stone dials beside 18K gold hands and AR sapphire crystal
• 8 min read • By Sebastien Rochat

Bespoke Horological Upgrades: Custom SW Natural Stone & Sunburst Dials, Solid 18K Diamond-Cut Hands & Double-AR Deep Sapphire Crystals

Elevating a solid 18K gold timepiece to Geneva collector specification requires upgrading three critical optical interfaces: replacing standard dial plates with bespoke SW sunburst or natural mineral stone dials (Lapis Lazuli, Turquoise, Eisenkiesel, Malachite), installing diamond-cut 3D-beveled solid 18K gold hands, and fitting a double-sided anti-reflective (AR) "Deep Crystal" corundum sapphire that boosts light transmission from 91.5% to 99.4%.

Gem-setter under a binocular microscope channel-setting VVS baguette diamonds and blue sapphires into a solid 18K white gold watch bezel
• 8 min read • By Sebastien Rochat

Microscopic Channel & Snow Pave Gem-Setting in Solid 18K Gold: VVS Baguette Diamonds, Blue Topaz, Emeralds & Rainbow Sapphires

True Geneva-grade horological gem-setting (sertissage) secures trapezoid and rectangular baguette diamonds, sapphires, and emeralds into 5-axis CNC-milled solid 18K gold (Au750) or 950 platinum channels with ±0.005 mm table-height coplanarity and zero adhesive, relying exclusively on microscopic precious-metal lip compression and hand-carved grain beads.

Browse Solid 18K Gold & Pt950 Horological Collections

Every custom timepiece commissioned through 18K CUSTOM is CNC-machined from solid 18-Karat Gold (Au750) or 950 Platinum and documented on 4K video on a Mettler-Toledo laboratory scale and Fischer XRF spectrometer before insured dispatch.

How does 18K Custom Atelier engineer its solid Au750, Pt950, and Custom CNC watch cases?

Every monobloc case, bezel, and bracelet link is precision-machined on 5-axis Swiss CNC centers to match the exact authentic original gram mass of the manufacture reference.

Can I inspect the movement regulation and custom dial details before shipping?

Yes. Every timepiece is photographed across 6 workbench angles and accompanied by a pre-shipment 4K video on our Witschi Chronoscope and Mettler-Toledo digital gram balance.

How are bespoke wrist sizing and international logistics handled?

Our watchmakers size the bracelet or strap to your exact wrist circumference (14.0 cm to 22.0 cm), include all spare links, and dispatch via insured priority courier.

● Added to Private Selection Portfolio
Private Client Concierge Desk

Allocation Portfolio (0)

Pre-Shipment 4K Scale & Timing Video Included Insured Vault Delivery
Verified Reference Mass 0.0g Verified
Total Private Allocation $0
Includes Personalized 4K Mettler-Toledo Scale & Witschi Timegrapher Dossier
All removed bracelet links accompany your timepiece inside the presentation box • Insured Brink's / DHL Express Priority
PRIVATE CLIENT DESK
Geneva • Monte-Carlo • Place Vendome

Private Allocation & 4K QC Dossier

1. Select Preferred Settlement Arrangement:
Allocation Dossier Reference
ALLOC-2026-884920
Total Allocation Value
$26,900 USD
Pre-Shipment 4K Laboratory Verification Protocol: Before any funds are finalized or your timepiece is dispatched, our Senior Watchmaker records a personalized 4K video of your exact serial number on a calibrated Mettler-Toledo gram scale and Witschi Chronoscope timegrapher.
GRAVIMETRIC & HOROLOGICAL SPECIFICATION MATRIX

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