Rolex Day-Date 40 vs Rolex Lady-Datejust
Ref. M228235-0055 vs Ref. M279135RBR-0010
The Rolex Day-Date 40 and Rolex Lady-Datejust both carry the Rolex name but serve different purposes — the Rolex Day-Date 40 as a dress watch and the Rolex Lady-Datejust as a dress watch. At $42,050 and $35,150 respectively, the question isn't which is better — it's which better fits your collection and investment goals.
Price Comparison
Rolex
Day-Date 40
Rolex
Lady-Datejust
At retail, the Rolex Day-Date 40 is listed at $42,050 while the Rolex Lady-Datejust comes in at $35,150. The Rolex Lady-Datejust saves you $6,900 (20% less), a meaningful difference for most buyers. On the secondary market, the gap widens: the Rolex Day-Date 40 trades around $42,000 and the Rolex Lady-Datejust around $33,393, a difference of $8,607 favoring the Rolex Lady-Datejust. Currently holding steady at just 0% below retail, this watch retains most of its value on the secondary market. The Rolex Lady-Datejust shows a more modest market premium of -5.0%, holding steady. Both watches score equally on flip potential at 4/10, making neither a clear investment winner over the other.
Specifications
| Specification | Rolex Day-Date 40 | Rolex Lady-Datejust |
|---|---|---|
| Case Diameter | 40mm | 28mm |
| Case Thickness | 12.4mm | 10.1mm |
| Case Material | 18ct Everose gold | 18ct Everose gold |
| Bezel | 18ct Everose gold, fluted | 18ct Everose gold, set with diamonds |
| Crystal | Sapphire with Cyclops lens | Sapphire with Cyclops lens |
| Water Resistance | 100m / 330ft | 100m / 330ft |
| Movement | Rolex calibre 3255 | Rolex calibre 2236 |
| Movement Type | Automatic | Automatic |
| Power Reserve | 70 hours | 55 hours |
| Bracelet/Strap | President, three-piece semi-circular links | President, three-piece semi-circular links in 18ct Everose gold |
| Clasp | Concealed folding Crownclasp | Concealed folding Crownclasp |
| Lug Width | 20mm | 14mm |
Key specification differences stand out between these two: the Rolex Day-Date 40 offers longer power reserve at 70 hours. With 5 notable spec differences in total, the choice depends on which features matter most to your use case.
Value Per Feature
Per millimeter of case diameter, the Rolex Day-Date 40 costs $1,050 versus $1,193 for the Rolex Lady-Datejust. For water resistance, the Rolex Lady-Datejust delivers better value per meter of depth rating. The Rolex Day-Date 40 offers more power reserve per dollar spent.
Which Should You Buy?
Choose the Rolex Day-Date 40 if you value better value retention. Go with the Rolex Lady-Datejust if you prioritize a lower entry price.
Frequently Asked Questions
Which is more affordable, the Rolex Day-Date 40 or the Rolex Lady-Datejust?
The Rolex Lady-Datejust is more accessible, priced at $35,150 compared to $42,050.
Which holds its value better on the secondary market?
The Rolex Day-Date 40 currently trades at 0.1% below retail, indicating moderate value retention on the pre-owned market.
How do the Rolex Day-Date 40 and Rolex Lady-Datejust compare in size?
The Rolex Day-Date 40 measures 40mm in diameter and 12.4mm thick, while the Rolex Lady-Datejust is 28mm by 10.1mm.
What movements do these watches use?
The Rolex Day-Date 40 uses the Rolex calibre 3255 with 70 hours power reserve, while the Rolex Lady-Datejust runs on the Rolex calibre 2236 offering 55 hours of power reserve.