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Rolex Day-Date 18238 (18k yellow gold, blue diamond dial) vs Rolex Oysterquartz Day-Date 19018 (18k yellow gold)
Rolex's timepiece meets Rolex's chronograph
Quick Verdict
The Rolex Day-Date 18238 (18k yellow gold, blue diamond dial) ($25,000+) and Rolex Oysterquartz Day-Date 19018 (18k yellow gold) ($25,000+) are closely matched timepieces at similar price points. The Day-Date 18238 (18k yellow gold, blue diamond dial) emphasizes Rolex 3155, in-house automatic, chronometer engineering while the Oysterquartz Day-Date 19018 (18k yellow gold) focuses on Swiss Made craftsmanship.
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Specifications Compared
| Feature | Rolex Day-Date 18238 (18k yellow gold, blue diamond dial) | Rolex Oysterquartz Day-Date 19018 (18k yellow gold) |
|---|---|---|
| Price | $25,000+ | $25,000+ |
| Case Size | 36mm | 36mm |
| Movement | Automatic, Rolex Calibre 3155 | Quartz, Rolex Calibre 5055 (chronometer-certified) |
| Caliber Type | Rolex 3155, in-house automatic, chronometer | Rolex 5055, in-house quartz, thermocompensated, 11 jewels |
| Power Reserve | About 48 hours | Battery |
| Water Resistance | 100m (10 ATM) | 100m (10 ATM) |
| Crystal | Sapphire Crystal, Cyclops | Sapphire Crystal, Cyclops |
| Case Material | 18k yellow gold | 18k yellow gold, integrated case and bracelet |
| Origin | Swiss Made | Swiss Made |
Category-by-Category Analysis
Design & Aesthetics
Rolex's design language vs Rolex's approach
The Rolex Day-Date 18238 (18k yellow gold, blue diamond dial) features a 18k yellow gold case at 36mm with Sapphire Crystal, Cyclops protection. The Rolex Oysterquartz Day-Date 19018 (18k yellow gold) offers 18k yellow gold, integrated case and bracelet construction at 36mm with Sapphire Crystal, Cyclops. Both represent their brand's distinct design philosophy and heritage.
Movement & Performance
Automatic, Rolex Calibre 3155 vs Quartz, Rolex Calibre 5055 (chronometer-certified)
The Day-Date 18238 (18k yellow gold, blue diamond dial) runs the Automatic, Rolex Calibre 3155 (Rolex 3155, in-house automatic, chronometer, About 48 hours power reserve) at standard frequency. The Oysterquartz Day-Date 19018 (18k yellow gold) uses the Quartz, Rolex Calibre 5055 (chronometer-certified) (Rolex 5055, in-house quartz, thermocompensated, 11 jewels, Battery reserve) at standard. The Day-Date 18238 (18k yellow gold, blue diamond dial) edges ahead on power reserve.
Wearability & Fit
36mm vs 36mm — different wrist presence
At 36mm, the Day-Date 18238 (18k yellow gold, blue diamond dial) is similarly sized compared to the Oysterquartz Day-Date 19018 (18k yellow gold) at 36mm. Water resistance differs: 100m (10 ATM) vs 100m (10 ATM).
Value & Cost of Ownership
Same tier — different value propositions
The Rolex Day-Date 18238 (18k yellow gold, blue diamond dial) sits at $25,000+ and the Rolex Oysterquartz Day-Date 19018 (18k yellow gold) at $25,000+. On the specs that outlast any price: the Day-Date 18238 (18k yellow gold, blue diamond dial) uses Sapphire Crystal, Cyclops with About 48 hours, against Sapphire Crystal, Cyclops and Battery on the Oysterquartz Day-Date 19018 (18k yellow gold). Service intervals are typically 5-7 years for both.
Water Resistance
100m (10 ATM) vs 100m (10 ATM)
The Day-Date 18238 (18k yellow gold, blue diamond dial) is rated to 100m (10 ATM) while the Oysterquartz Day-Date 19018 (18k yellow gold) handles 100m (10 ATM). Both offer identical water resistance ratings.
Our Verdict
Rolex
Day-Date 18238 (18k yellow gold, blue diamond dial)
Choose the Rolex Day-Date 18238 (18k yellow gold, blue diamond dial) if you prioritize Rolex 3155, in-house automatic, chronometer engineering, Swiss Made craftsmanship, and 100m (10 ATM) water resistance. At $25,000+, it delivers Automatic, Rolex Calibre 3155 with About 48 hours power reserve.
Check Price on AmazonRolex
Oysterquartz Day-Date 19018 (18k yellow gold)
Choose the Rolex Oysterquartz Day-Date 19018 (18k yellow gold) if you value Rolex 5055, in-house quartz, thermocompensated, 11 jewels technology, Swiss Made heritage, and 36mm proportions. At $25,000+, the Quartz, Rolex Calibre 5055 (chronometer-certified) with Battery power reserve makes it a compelling choice.
Check Price on AmazonThe Bottom Line
The Rolex Day-Date 18238 (18k yellow gold, blue diamond dial) and Rolex Oysterquartz Day-Date 19018 (18k yellow gold) represent two distinct approaches to fine watchmaking — the Rolex bringing Swiss Made tradition while Rolex delivers Swiss Made engineering.
Frequently Asked Questions
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How This Page Was Made
Our comparisons are generated from a hand-maintained specification database and reviewed under our editorial standards. We use AI tools to assemble pages from that data. We don’t invent specs: every number traces back to the database, and when we correct an entry, the fix is applied site-wide. As an Amazon Associate, The Horologist earns from qualifying purchases.