About 45mm Watches
The 45mm case diameter sits at the larger end of the modern luxury watch spectrum and has become the signature sizing for bold, statement-making timepieces that balance legibility with visual drama. Hublot helped define this format with the Classic Fusion line, blending architectural case design, sapphire crystal exhibition dials, and meaningful complications like the Aerofusion moonphase into a single wearable package. The Classic Fusion Aerofusion Moonphase references in the 517 family exemplify this philosophy, pairing a rotating moonphase disc visible through the openworked dial with case materials that range from lightweight titanium to the brand's proprietary 18-karat King Gold alloy and scratch-resistant ceramic. This size is particularly popular among collectors who want a watch with presence on the wrist and a complication that rewards close inspection.
What to Look For
When comparing references within this 45mm Hublot Aerofusion Moonphase collection, the primary differentiators are case material and diamond setting level: titanium references such as 517.NX.0170.LR offer a lightweight, modern feel, King Gold references like 517.OX.0180.LR add warmth and prestige, and the Black Magic ceramic 517.CX.0170.LR delivers a stealthier aesthetic with exceptional scratch resistance. Diamond pave and full diamond variants, denoted by suffixes such as .1704 and .1104, command a significant premium and are rarer on the secondary market, making the base references a strong entry point for buyers prioritizing value retention.
Frequently Asked Questions
What is the Hublot Classic Fusion Aerofusion Moonphase 45mm?
The Hublot Classic Fusion Aerofusion Moonphase 45mm is a luxury Swiss watch featuring a skeletonized sapphire dial with an integrated moonphase complication, housed in a 45mm case available in titanium, King Gold, and ceramic Black Magic. The Aerofusion name refers to the openworked construction that blends the dial and movement into a single visual experience. These watches are identified by the 517-series reference numbers and are among Hublot's most technically showcased Classic Fusion variants.
What is the difference between the titanium and King Gold versions?
The titanium references such as 517.NX.0170.LR use a lightweight, corrosion-resistant case that wears comfortably on the wrist and presents a contemporary grey-tone aesthetic, while King Gold references like 517.OX.0180.LR feature Hublot's proprietary 18-karat rose gold alloy, which is harder and more resistant to fading than standard gold. King Gold versions typically carry a higher price point both new and pre-owned due to the intrinsic precious metal value and the added exclusivity of the material.
Are the diamond-set versions worth the premium?
Diamond pave and diamond-set variants of the Classic Fusion Aerofusion Moonphase 45mm, identified by reference suffixes like .1704 and .1104, are factory-set by Hublot and add considerable visual impact with diamonds on the bezel and bracelet or strap lugs. These configurations are produced in smaller quantities and tend to appeal to collectors who want maximum visual distinction, though resale liquidity can be narrower than for the unadorned base references. Buyers on a defined budget often find the non-diamond references deliver the same movement and complication at a more accessible price.
Buy, trade, or sell. Contact Bizak & Co. for pricing and availability on any reference in this collection.
