Rolex Sky-Dweller 336238 18k Yellow Gold Champagne Dial Oysterflex

The Sky-Dweller 336238: Rolex’s Most Complicated Watch, in Solid Gold, Unworn

The Rolex Sky-Dweller has held a unique position in the collection since its debut in 2012 — it is the brand’s most technically elaborate wristwatch, combining two of the most challenging complications in watchmaking into a single movement, then controlling both through an ingenious bezel interface that has no parallel in the industry. The 336238 is the yellow gold Oysterflex variant: a 42mm solid 18-karat yellow gold case paired with the black elastomer Oysterflex strap, creating the kind of quiet contradiction — sporty flexibility, precious metal substance — that the Sky-Dweller does better than almost any other watch.

This particular example is New Old Stock: In Mint condition, is offered in full set, and represents one of the rarest ways to acquire a Sky-Dweller 336238 — at below retail, without the waitlist.

Ring Command: The Bezel That Controls Everything

Rotate the bezel of a standard Rolex and nothing happens to the movement — it is decorative or a simple countdown timer. Rotate the Ring Command bezel on a Sky-Dweller, and you select a function. Turn the crown, and you adjust that function. This is the Ring Command system: a Rolex-patented mechanism of approximately 70 components integrated into the bezel, crown, and movement that transforms the crown from a single-function adjuster into a multi-mode controller.

Three bezel positions correspond to three functions: adjust the date and month display; set the local (home) time reference; or move the local hour hand independently in one-hour steps. The local hand can be advanced or retracted without touching the seconds hand or the reference time display — a precision that matters for frequent travellers who want their true home time running continuously while they reset for local time zones. Set it and forget it; the Ring Command does the rest.

Saros Annual Calendar: Twelve Months, One Correction Per Year

The Sky-Dweller’s annual calendar — which Rolex calls the Saros — does something a standard date window cannot: it differentiates 30-day months from 31-day months automatically, requiring just one manual correction per year (1 March, the only occasion the mechanism cannot distinguish February’s shorter end). Twelve apertures arranged around the dial’s periphery display the months; the current month is shown in red. The date appears at the 3 o’clock position through a traditional magnified window beneath the Cyclops lens on the sapphire crystal.

This is not a simple quick-set date — it is an intelligent calendar module built into the movement that tracks the actual structure of the Gregorian year. For anyone who has ever had to advance a standard date display through the end of April, June, September, or November, the difference is immediately apparent.

Dual Time Zone: Off-Centre 24-Hour Disc

The second major complication is a dual time zone displayed via an off-centre 24-hour disc visible through the dial. A red triangle indicator marks the reference (home) time against the 24-hour scale, allowing the wearer to read both local and reference time simultaneously at a glance. The disc runs continuously with the movement; only the local hour hand is adjusted via the Ring Command bezel. The result is a system where both time zones are always visible, always running, and independently managed without interference.

Calibre 9002: The Second Generation

The 336238 houses Rolex Calibre 9002, the second-generation Sky-Dweller movement introduced in 2023. It operates at 28,800 vph (4 Hz) across 40 jewels with an approximately 72-hour power reserve — a meaningful extension over the first-generation calibre. The 9002 incorporates Rolex’s Chronergy escapement (a redesigned Swiss lever escapement offering improved energy efficiency), a Parachrom Blue paramagnetic hairspring that provides resistance to shocks and magnetic fields, and Paraflex shock absorbers at the balance pivots. As a Rolex Superlative Chronometer, it is certified to ±2 seconds per day — tighter than the COSC standard — after casing and testing as a complete watch.

Case, Crystal, and Dial

The case is solid 18-karat yellow gold — not gold-capped, not two-tone, not plated. The 42mm diameter is 2mm larger than the classic Datejust footprint, giving the Sky-Dweller a commanding presence on the wrist without exceeding the bounds of a dress watch. Case thickness is approximately 14.1mm; lug width 21mm. The rotating bezel is also solid 18-karat yellow gold, fluted — the fluting is functional as well as decorative, providing grip for the Ring Command rotation.

The sapphire crystal is flat across the main surface with an integrated Cyclops magnifier at 3 o’clock, enhancing date legibility. Inner surfaces carry Rolex’s anti-reflective coating. The caseback is solid and screw-down; the movement is not visible.

The champagne dial carries a sunburst finish that shifts between pale gold and deep amber depending on the angle of light — a characteristic unique to Rolex’s production dial polishing process. Applied stick/dot markers in yellow gold sit at the hours; the month apertures around the periphery are recessed and filled. The overall effect is of substantial richness: a dial that earns looking at.

Oysterflex: The Case for Rubber on a Gold Watch

Rolex introduced the Oysterflex to solve a specific problem: precious metal bracelets are heavy, and on sport or dress-sport models they add significant wrist weight. The Oysterflex consists of two curved longitudinal metal blades — the structural core — overmoulded in black high-performance elastomer. The blades conform naturally to wrist movement; the elastomer provides the tactile flexibility of a rubber strap. The result is a strap that wears lighter than a solid gold bracelet, resists sweat and water without staining, and maintains its shape long-term.

Fastening is managed by the Glidelock extension clasp: six notches of approximately 2.5mm each provide roughly 15mm of micro-adjustment in the closed position, allowing precise sizing without removing links. The clasp is an Oysterclasp in yellow gold, flush to the strap profile.

Water Resistance and Specifications

The Oyster case is water resistant to 100 metres — not pool-proof by accident, but as a consequence of the same hermetic case architecture Rolex has refined across the professional range. The screw-down winding crown sits flush to the case at the 3 o’clock position in a standard Oyster configuration.

Watch in Detail

• Reference: 336238
• Generation: 2nd generation Sky-Dweller (Cal. 9002, introduced 2023)
• Case material: Solid 18-karat yellow gold
• Case diameter: 42mm
• Case thickness: ~14.1mm
• Lug width: 21mm
• Crystal: Flat sapphire with Cyclops magnifier at 3 o’clock; anti-reflective coating
• Caseback: Solid screw-down (non-exhibition)
• Dial: Champagne, sunburst finish, applied yellow gold stick/dot hour markers
• Complications: Annual calendar (Saros); dual time zone (24hr off-centre disc)
• Bezel: Solid 18-karat yellow gold, fluted, bidirectional rotating — Ring Command system (~70 components)
• Movement: Rolex Calibre 9002, self-winding
• Frequency: 28,800 vph (4 Hz)
• Jewels: 40
• Power reserve: ~72 hours
• Escapement: Chronergy (improved Swiss lever)
• Hairspring: Parachrom Blue paramagnetic
• Shock protection: Paraflex shock absorbers
• Certification: Superlative Chronometer — ±2 sec/day (COSC + Rolex in-house post-casing)
• Strap: Oysterflex — metal blades overmoulded in black elastomer; Oysterclasp in yellow gold
• Water resistance: 100m / 330ft
• Condition: New Old Stock (NOS) — Unworn, Mint
• Year: Q4 2025 with balance of Rolex warranty until 2030.
• Set: Full set

FAQs

Q: What is the difference between the Rolex Sky-Dweller 336238 and 336239? A: The 336238 is set in 18-karat yellow gold; the 336239 is 18-karat white gold. Both are available with the Oysterflex strap or on a matching precious metal bracelet. The 336238 carries the warmer, more traditional gold tone; the 336239 presents a cooler, platinum-adjacent look. Both house the same Calibre 9002 movement with identical complications.

Q: What does “New Old Stock” mean for a Rolex? A: New Old Stock (NOS) occupies a unique position: technically pre-owned (it has changed hands at least once), but physically and mechanically equivalent to a brand-new watch with the exception of minor handling/storage marks over time. NOS watches are typically offered at a lower price than freshly dated, new pieces, offering a better value proposition and price point.

Q: What complications does the Rolex Sky-Dweller have? A: The Sky-Dweller has two main complications: an annual calendar (Saros) and a dual time zone. The Saros annual calendar differentiates 30-day and 31-day months automatically, requiring only one manual correction per year (1 March). The month is displayed through 12 apertures around the dial, with the current month shown in red; the date appears at 3 o’clock. The dual time zone is displayed via an off-centre 24-hour disc with a red triangle indicator. Both complications are controlled via the Ring Command bezel — a Rolex-patented system of approximately 70 components.

Q: How does the Ring Command bezel work? A: The Ring Command bezel links the outer rotating bezel to the crown and movement through a system of approximately 70 components. Rotating the bezel selects one of three functions: (1) adjust the date and annual calendar display, (2) set the reference (home) time, or (3) adjust the local hour hand independently in one-hour increments without affecting the seconds or reference time. Turning the crown then adjusts whichever function the bezel has selected. This eliminates the need to pull the crown to different positions for different functions — a patented interface unique to Rolex.

Q: Why is the Rolex Sky-Dweller 336238 on an Oysterflex strap instead of a bracelet? A: The Oysterflex strap is designed to reduce total wrist weight compared with a solid precious metal bracelet. It consists of two curved metal blades overmoulded in black high-performance elastomer, giving the structural support of metal with the flexibility and comfort of a rubber strap. On a solid gold watch such as the 336238, the Oysterflex meaningfully reduces wrist weight while maintaining a formal, finished appearance. The Glidelock extension clasp provides approximately 15mm of on-the-fly sizing adjustment.

Q: What is Calibre 9002 and how does it differ from Calibre 9001? A: The Rolex Calibre 9002 is the second-generation Sky-Dweller movement, introduced in 2023 in the 336xxx series references. It differs from the first-generation Calibre 9001 (used in the original 326xxx references) primarily through the addition of the Chronergy escapement — an improved Swiss lever geometry offering better energy efficiency. The 9002 retains the Parachrom Blue paramagnetic hairspring, Paraflex shock absorbers, and Superlative Chronometer certification to ±2 seconds per day.

Q: Is the Rolex Sky-Dweller 336238 hard to find? A: Yes. The Sky-Dweller in solid yellow gold is among Rolex’s most allocated references. Supply through authorised dealers is tightly controlled and demand significantly exceeds availability. Examples that are below retail and yet unused are considerably rarer.

Q: What is the water resistance of the Rolex Sky-Dweller 336238? A: The Sky-Dweller 336238 is water resistant to 100 metres (330 feet). This is achieved through the Oyster case architecture: a solid screw-down caseback, a screw-down winding crown, and the sapphire crystal gasket system. It is suitable for swimming and brief immersion, though it is not rated for professional diving.