Private Treaty Vault Dossier — XRF Gold Assay & Chronometric Certification
Non-Destructive Fischer XRF Au750 & Pt950 Spectrometry Protocol
Every precious-metal timepiece curated by 18K VIP undergoes three-point non-destructive X-Ray Fluorescence (XRF) spectroscopy across the monobloc middle case, bezel ring, and deployant clasp links. Our Fischer XRF instrument verifies an elemental composition of 75.0% pure gold Au750 balanced with silver, copper, and palladium/platinum for 18K yellow, rose, Everose, and white gold references, or 95.0% pure platinum (Pt950) for platinum editions.
Mettler-Toledo Gravimetric Mass Verification (33.2g to 282.5g)
Because 18-karat gold possesses a specific gravity of 15.5 g/cm3 and 950 platinum reaches 21.45 g/cm3, physical mass on a calibrated 0.01g Mettler-Toledo analytical balance is the ultimate proof of solid precious-metal construction. Prior to dispatch, every client receives a personalized 4K video recording the exact gram weight, XRF spectrum trace, and 6-position Witschi Chronoscope rate.
Every lot catalogued by 18K VIP is verified on a calibrated Mettler-Toledo laboratory scale and Fischer XRF spectrometer on 4K video prior to private treaty allocation and insured armored delivery.
How does Fischer XRF spectroscopy verify 18K solid gold without scratching the watch?
X-Ray Fluorescence excites secondary atomic X-rays from the alloy surface and reads the exact elemental percentages of Gold (Au 75.0%), Silver (Ag), Copper (Cu), and Palladium (Pd) in seconds with zero physical contact or abrasion.
Why is Mettler-Toledo gram weighing performed alongside XRF testing?
Combining XRF surface spectroscopy with full-watch gravimetric weighing (for example, 207.0g for a solid 18K Daytona or 282.5g for a 950 Platinum Daytona) confirms that the entire case and bracelet core are solid precious metal.
Do I receive the 4K XRF and scale video of my exact timepiece before shipping?
Yes. Before your shipment is sealed, our laboratory transmits a personalized 4K video showing your specific timepiece on the Mettler-Toledo balance, Fischer XRF chamber, and Witschi Chronoscope.