441.NX.1171.RX
120.2g
$2,600
Inspect
01 • Front Dial Portrait (1 / 7)
METALLURGICAL & CHRONOMETRIC DOSSIER
Fischer XRF Au750 (75.0%) & Mettler-Toledo Gravimetric Verification
The Hublot Square Bang Unico Chronograph 42mm 18K King Gold Reference 821.OX.0180.RX is a Monte-Carlo registered luxury timepiece crafted in 18K Rose Gold Au750 (42.0 mm x 14.5 mm) with a verified Mettler-Toledo analytical weight of 120.8g, powered by Hublot Unico Flyback Chronograph Cal. HUB1280 beating at 28,800 vph (+0.8 s/d, 298 deg) with a 72-hour power reserve, double anti-reflective sapphire crystal, and 100m / 10 ATM water resistance.
| Entity, Maison & Official Reference | Hublot — Big Bang / Square Bang Unico | Ref. 821.OX.0180.RX | SKU: MC-AU750-821.OX.0180.RX-W479 |
|---|---|
| Precious Metal Alloy & XRF Purity | 18K Rose Gold Au750 — Au750 — 75.0% Pure 18K Gold Bullion (XRF Verified) • Hallmarked Solid Precious Metal |
| Verified Total Mass (Mettler-Toledo Scale) | 120.8g — 1:1 Authentic Reference Mass Verified on Mettler-Toledo Analytical Scale |
| Bezel Architecture & Gem-Setting Spec | Hand-Finished 18K Rose Gold Bezel with Anti-Reflective Scratch-Resistant Sapphire Crystal • 120.8g 18K Rose Gold • 42.0 mm x 14.5 mm |
| Swiss Super Clone Movement Calibre | Hublot Unico Flyback Chronograph Cal. HUB1280 — Swiss Super Clone Mechanical Calibre Regulated to +0.8 s/d, 298 deg |
| Power Reserve & Oscillation Frequency | 72-Hour Power Reserve • 28,800 vph (4 Hz) Free-Sprung Balance Wheel |
| Double AR Sapphire Crystal & Water Resistance | Scratch-Resistant Sapphire Crystal with Double Anti-Reflective Coating • 100m / 10 ATM |
| Dial Finishing & Hallmarked Bracelet Clasp | 42.0 mm x 14.5 mm • Hand-Finished Collector Dial with Solid 18K Gold Applied Hour Markers & Hands • Integrated 18K Rose Gold Solid Link Bracelet & Deployant Clasp with Deep Laser Hallmarks |
Recorded in our Monte-Carlo solid 18K gold Hublot register, the Hublot Square Bang Unico Chronograph 42mm 18K King Gold Reference 821.OX.0180.RX unites authentic Geneva proportions (42.0 mm x 14.5 mm) with a certified 18K Rose Gold Au750 mass of 120.8g. Every detail of the Hand-Finished Collector Dial with Solid 18K Gold Applied Hour Markers & Hands, Hand-Finished 18K Rose Gold Bezel with Anti-Reflective Scratch-Resistant Sapphire Crystal, and hallmarked clasp is verified under our Fischer XRF Au750 and Mettler-Toledo laboratory protocol.
5 Core Horological & Metallurgical Specifications:
- Registered Entity & Ref: Hublot Square Bang Unico Chronograph 42mm 18K King Gold — Official Reference 821.OX.0180.RX (SKU: MC-AU750-821.OX.0180.RX-W479).
- Precious Metal Alloy: 18K Rose Gold Au750 with deep mechanical hallmarking and 5-axis Swiss CNC case finishing.
- Verified Reference Mass: 120.8g confirmed on our Monte-Carlo showroom Mettler-Toledo analytical balance.
- Mechanical Calibre: Hublot Unico Flyback Chronograph Cal. HUB1280 operating at 28,800 vph (4 Hz) with 72-hour power reserve (+0.8 s/d, 298 deg).
- Sapphire Crystal & QC: Scratch-resistant sapphire crystal with double anti-reflective coating and 100m / 10 ATM water resistance.
Within the same Hublot horological silo, collectors also compare the Hublot Big Bang Unico Flyback Chronograph 42mm Ref. 441.NX.1171.RX (120.2g) and the Hublot Big Bang Unico 42mm Full VVS Diamond & Ruby Rehaut Edition Ref. 441.NX.1170.RX (120.3g).
REFERENCE-SPECIFIC COLLECTOR Q&A
What is the verified authentic weight of this Hublot Ref. 821.OX.0180.RX?
This Hublot Square Bang Unico Chronograph 42mm 18K King Gold Ref. 821.OX.0180.RX weighs 120.8g in 18K Rose Gold Au750, matching the exact authentic factory weight on our Monte-Carlo showroom Mettler-Toledo analytical balance.
Are all 7 showroom photographs of Reference 821.OX.0180.RX unedited studio shots?
Yes. All 7 gallery plates show the actual timepiece captured across multiple studio angles on our quality-control bench with zero stock renders.
Which movement powers Reference 821.OX.0180.RX and how do I request the 4K QC video?
Reference 821.OX.0180.RX is powered by the Hublot Unico Flyback Chronograph Cal. HUB1280 (28,800 vph, 72-hour power reserve, regulated to +0.8 s/d, 298 deg). Message our Monte-Carlo Private Client Concierge on WhatsApp (+1 305 724 0661) for your personalized 4K video dossier.
Hublot • REF. 821.OX.0180.RX
120.8g VERIFIED
Hublot Square Bang Unico Chronograph 42mm 18K King Gold Ref. 821.OX.0180.RX
Monte-Carlo Reference Register • 120.8g 18K Rose Gold Au750 • Hublot Unico Flyback Chronograph Cal. HUB1280
PRIVATE CLIENT ALLOCATION
$24,400
USDT
Secondary Market Estimate: $44,000
LIVE SWISS ASSAY TELEMETRY • BENCH #04
4K QC VIDEO READY
METTLER-TOLEDO
120.8g
1:1 Exact Mass
FISCHER XRF
Au 75.04%
18K Solid Au750
WITSCHI X1
+0.4 s/d
296° • 0.0 ms
Includes personalized 4K scale & XRF video on WhatsApp before dispatch
▶ Sample QC
✓ Confidential Private Client Escrow, Bank Wire & Direct Digital Settlement
✓ 4K Mettler-Toledo scale & Fischer XRF Au750 video approval before dispatch
✓ Insured DHL Express / Ferrari Group armored delivery
