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Black Tag Watches
Address: 20900 NE 30th Ave 10th Floor.
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Aventura FL 33180 USA
Email: sales@blacktagwatches.com
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Always active
The technical storage or access is strictly necessary for the legitimate purpose of enabling the use of a specific service explicitly requested by the subscriber or user, or for the sole purpose of carrying out the transmission of a communication over an electronic communications network.
Preferences
The technical storage or access is necessary for the legitimate purpose of storing preferences that are not requested by the subscriber or user.
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The technical storage or access that is used exclusively for statistical purposes.
The technical storage or access that is used exclusively for anonymous statistical purposes. Without a subpoena, voluntary compliance on the part of your Internet Service Provider, or additional records from a third party, information stored or retrieved for this purpose alone cannot usually be used to identify you.
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Pre-Owned Hublot Classic Fusion 42mm 18K King Gold — Blue Sunray Dial (Ref. 542.OX.7180 Series)
Most rose gold watches get darker over time as the copper in the alloy oxidises. In 2010, Hublot added a measured 0.4% of platinum to its own rose gold recipe specifically to stop that from happening — and patented the result as King Gold.
Available now at Black Tag Watches (Aventura, Florida), this pre-owned example — reference 542.OX.7180 series — is cased in 18K King Gold with a blue sunray dial, powered by the HUB1110 Swiss automatic, and offered in mint condition with the original strap and signed deployment buckle.
What Is the Hublot Classic Fusion King Gold?
King Gold: A Patented Alloy, Not a Marketing Name
The pre-owned Hublot Classic Fusion in King Gold is the maison’s most considered rose-gold expression of its signature mid-range dress-sport reference. King Gold is not a marketing descriptor: it is Hublot’s own patented 18K gold alloy, developed jointly with the École Polytechnique Fédérale de Lausanne — Switzerland’s leading federal institute of technology — introduced in 2010 and announced publicly in 2011. The composition is specific: 75% gold, approximately 24% copper, and a measured 0.4% platinum. The elevated copper content gives the alloy its deeper, redder tone than the industry-standard 5N 18K rose gold used by most Swiss houses; the platinum additive is the engineering move that distinguishes it, inhibiting the copper oxidation that causes conventional rose gold to darken and fade over time.
A Case Material That Holds Its Colour
The result is a case material that holds its colour long-term rather than dulling, and that is exclusive to the Hublot catalogue under current patent. For buyers of pre-owned rose-gold watches, that distinction is substantive: most rose-gold cases soften in tone over years of wear, while King Gold was specifically engineered not to. The Classic Fusion 42mm in King Gold is the maison’s dial-forward dress reference executed in this specific material — the quieter, more wearable side of the Hublot catalogue rather than the Big Bang’s sport-chronograph complexity.
Dial & Case Design: Porthole Bezel, Blue Sunray Dial
The Classic Fusion Case and Porthole Signature
The 42mm case is rendered in satin-finished and polished 18K King Gold, with the Classic Fusion’s defining geometry: a round polished case flank beneath a satin-finished King Gold bezel secured by six H-shaped titanium screws — the “porthole” signature carried across every Hublot reference since the maison’s 1980 founding under Carlo Crocco, and the design element that distinguishes a Hublot across a room. The satin-and-polish contrast on the case and bezel gives the reference its dress-sport register: formal enough for everyday luxury, distinctive enough to read immediately as Hublot.
The Blue Sunray Dial
The dial is a deep blue sunray with satin finishing that reads light-reactive rather than static — the blue appears richer under direct light and recedes into near-navy in shadow — with polished King Gold applied baton indices and matching polished King Gold hour and minute hands. A date aperture sits at 3 o’clock, framed in King Gold to match the hour markers rather than printed in neutral white. The dial carries the Hublot signature beneath 12 and “Classic Fusion” beneath the handset. The composition is deliberately pared back relative to the Big Bang’s complexity: this is the Hublot reference built around the dial rather than around the complication, and a sapphire display caseback exposes the movement.
Movement: Hublot Calibre HUB1110 — Swiss Automatic
A Material-First Reference
Inside the Classic Fusion is the Hublot calibre HUB1110 — a Swiss automatic movement with an approximate 42-hour power reserve. The HUB1110 is Hublot’s designation for the base automatic architecture used across the 42mm Classic Fusion three-hand references, finished to the maison’s standards for the collection with a signed oscillating weight visible through the sapphire display caseback. The movement drives the central hours, minutes, seconds, and date. As a horological argument for an upper-mid-tier dial-forward dress-sport reference at this price band, the HUB1110 does what a properly configured Swiss automatic should do in this class: it drives the dial reliably, keeps accurate time, and is serviceable through any qualified Swiss watchmaker or through Hublot’s own service network. The horological centre of the piece sits in the case material and the dial finishing rather than in the base calibre — a distinction worth stating plainly.
Movement Specifications
Specification
Detail
Calibre
Hublot HUB1110, Swiss automatic
Functions
Hours, minutes, seconds, date
Power reserve
~42 hours
Water resistance
50m / 5 ATM
Caseback
Sapphire display
Condition, Provenance & Documentation
Original Strap and Signed Buckle Intact
Condition is mint. The watch is offered on the original Hublot blue rubber and alligator leather composite strap with a King Gold and black PVD stainless steel deployment buckle. For a Classic Fusion in King Gold with the original strap and signed deployment buckle intact, this is the appropriate acquisition configuration for the reference — the case markings are verifiable against Hublot’s records, and Hublot boutiques and service centres continue to service the Classic Fusion line under the standard programme. The buckle, the meaningful provenance signal at the strap level and the specific component that identifies a watch as originally delivered from the maison rather than aftermarket-strapped, is present and correct.
Condition and Accessories
Detail
Information
Condition
Mint
Strap
Original Hublot blue rubber + alligator composite
Buckle
King Gold + black PVD steel deployment
Case markings
Verifiable against Hublot records
Full Specifications — Hublot Classic Fusion King Gold 542.OX.7180 Series
Specification
Detail
Brand
Hublot (Nyon, founded 1980)
Collection
Classic Fusion
Reference
542.OX.7180 series
Case material
18K King Gold (patented 2010/2011)
King Gold
~75% gold, 24% copper, 0.4% platinum
Case
42mm, satin + polished
Bezel
King Gold, 6 H-shaped titanium screws
Crystal
Sapphire, anti-reflective
Dial
Blue sunray, satin
Markers
Polished King Gold baton, matching hands
Date
At 3 o’clock, King Gold frame
Movement
Hublot HUB1110, Swiss automatic
Power reserve
~42 hours
Water resistance
50m / 5 ATM
Caseback
Sapphire display
Strap
Original Hublot rubber + alligator composite
Buckle
King Gold + black PVD steel deployment
Condition
Mint
Why Buy a Pre-Owned Hublot Classic Fusion King Gold?
A Technical Innovation the Market Underreads
The Classic Fusion King Gold Blue occupies a specific corner of the contemporary Hublot secondary market — recognised by buyers who read King Gold as a substantive technical innovation rather than marketing nomenclature, and often overlooked by buyers whose Hublot familiarity is anchored to the Big Bang’s cultural visibility rather than to the maison’s dial-forward dress register. The Classic Fusion is Hublot’s quieter line, and the 42mm proportion in solid King Gold is the dress-sport configuration that reads most legibly as everyday luxury rather than as statement wrist. For the buyer who values the patented alloy and the porthole geometry over cultural visibility, the Classic Fusion King Gold is the more considered choice in the Hublot catalogue.
Material Content Without the Visibility Premium
Current primary-market retail on the 542.OX.7180 reference sits at approximately $21,700 to $23,000 depending on strap configuration, and pre-owned examples with original full delivery occupy the material-content tier of the secondary market without the premium that cultural-visibility Hublot references command. Against contemporary rose-gold dress-sport retail — and against the current Hublot catalogue on the Classic Fusion 542.OX.7180 series — this pre-owned example offers a solid King Gold case in Hublot’s own patented alloy, the maison’s defining porthole bezel geometry, and a dial-forward register at a level that rewards horological literacy over badge recognition.
Available at Black Tag Watches — Aventura, Florida
Black Tag Watches is a pre-owned luxury watch dealer based in Aventura, FL, specialising in rare, certified, and fully documented timepieces from Hublot and the world’s leading Swiss manufactures.
View the Hublot Classic Fusion King Gold Blue Dial — Full Details & Pricing
A 42mm Classic Fusion in Hublot’s own patented King Gold — the maison’s dial-forward dress reference executed in the specific alloy that was engineered to hold its colour long after the standard rose gold case has started to darken.
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