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Description
Rolex Day-Date 128239 White Gold 36mm Blue Ombré Diamond Dial with Fluted BezelFeature Description Case Shape Oyster Case Dimensions 36 mm Case Material 18 kt white gold Dial Color Blue ombr set with diamonds Crystal Scratch resistant sapphire, Cyclops lens over the date Bezel Fluted Screw in Crown Screw down, Twinlock double waterproofness system Water Resistance Waterproof to 100 metres 330 feet Case Back Oyster architecture, Monobloc middle case, screw down case back and crown Bracelet President, semi circular three piece
| Feature | Description |
|---|---|
| Case Shape | Oyster |
| Case Dimensions | 36 mm |
| Case Material | 18 kt white gold |
| Dial Color | Blue ombré set with diamonds |
| Crystal | Scratch-resistant sapphire, Cyclops lens over the date |
| Bezel | Fluted |
| Screw-in Crown | Screw-down, Twinlock double waterproofness system |
| Water Resistance | Waterproof to 100 metres / 330 feet |
| Case Back | Oyster architecture, Monobloc middle case, screw-down case back and crown |
| Bracelet | President, semi-circular three-piece links |
| Bracelet Material | 18 kt white gold |
| Clasp | Concealed folding Crownclasp |
| Movement | Perpetual, mechanical, self-winding |
| Complications | Centre hour, minute and seconds hands. Instantaneous day and date in apertures, secure rapid-setting. Stop-seconds |
| Winding | Bidirectional self-winding via Perpetual rotor |
| Power Reserve | Approximately 70 hours |
| COSC Certified | Superlative Chronometer (COSC + Rolex certification after casing) |
| Dial Details | Blue ombré gradient with diamond hour markers, baguette-cut diamonds at 6 and 9 o’clock |
The Rolex Day-Date 36 ref. 128239 in 18 kt white gold features a striking blue ombré dial set with brilliant and baguette-cut diamonds—an artistic expression of color and luxury. The dial's gradient transitions from rich blue to deep black, paired with luminous diamond markers and exclusive baguette diamonds at 6 and 9 o’clock.
Encased in solid white gold, the refined fluted bezel complements the elegant President bracelet, delivering unparalleled comfort and sophistication. Powered by the Calibre 3255, this timepiece ensures top-tier precision and a robust 70-hour power reserve. Waterproof to 100 meters, the Day-Date 36 combines elite performance with iconic Rolex aesthetics.
Ideal for collectors and connoisseurs alike, this watch is both a masterpiece of design and a celebration of Rolex’s legendary craftsmanship.
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4.8 ★★★★★
Based on 1783 reviews
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Product Reviews
★★★★★ 5
CODE is the book you should get.
Format: Paperback
The best book to enter the field. Grateful that Charles Petzold decided to write it, even happier this was one of the first books I picked up.
Recommend to everyone wanting to become a programmer, or just interested in computers.
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Reviewed in the United States on January 12, 2026
★★★★★ 5
If you only buy one technical computer book, this is it
Format: Paperback
Disclaimer: I owned the first edition for years and read it a dozen times, mainly for pleasure since it’s not only informative but also just enjoyable to read. I’m a professional software architect and have dozens of textbooks on computer science and engineering so I’ve been around the block.
This is the kind of book I would buy all for all my friends (if I had more than a couple) and family members (if they were even slightly into computers, which they aren’t sadly). Petzold does an exceptional job at describing digital logic and guides you through building a conceptual CPU from very first principles.
I think his bottom up approach is the way to go and has helped me understand complex topics in an extremely simple way. When I’m not reading fiction, this is my go to bedtime reading.
The second edition has about 100 more pages than the first and some content has been completely reworked and it’s great.
If you ever had even a passing interest in knowing how computers work at a very fundamental level, get this book!
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Reviewed in the United States on January 31, 2023
★★★★★ 4
First programmer?
Format: Paperback
As an ardent reader of the past 1st edition, I was fairly excited to get the latest version. That is, until I encountered the history chapter of the new edition.
For one thing, what I do NOT understand in this second edition is the newly added description of August Ada Byron (countless of Lovelace). The author claims it was Babbage who was the first programmer to design the engines, not Ada. I am not trying to start a futile argument here about who has more or fewer contributions, etc.
What I am trying to assert here is that it is undisputed that Ada (unless the new evidence arises) left *the very first demonstration* of what this seemingly imaginary machine, which didn't even physically exist, was capable of through her program. Because Babbage designed the engine itself, that doesn't automatically put him in the position of a programmer (despite Babbage being a brilliant engineer/scientist and may have had a simple or detailed program in his mind). However, it was Ada who gave a definite touch to programming concepts that ultimately led to modern-day programming. Ada deserves more recognition than a mere "tutorial writer," and she is certainly entitled to the title she deserves.
Other than that, like the previous edition, this book is a must-read for people who are from related/unrelated fields. I always loved the 1st edition, and I would do too with the 2nd. Still, I think history should always be approached with more care, particularly if matters have potential controversies.
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Reviewed in the United States on January 6, 2023
★★★★★ 5
One of the few books worth your time
Format: Paperback
If you want to learn computers, start here. Learning from a historical perspective removes complexity of trying to start with say GPUs - you learn just like computer engineers did, incrementally.
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Reviewed in the United States on April 27, 2026
★★★★★ 5
An absolutely brilliant book
Format: Paperback
This is an amazing book for the right kind of reader. It's a lot like Euclid's Elements but for computers as it leads the reader through designing a computer from first principles and builds to the point of creating software and adding peripherals. It's an amazingly clear but slightly challenging read. I have given this book as a gift many many times. It's an absolute classic in my opinion.
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Reviewed in the United States on March 19, 2025
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