Summary of Key Points about the Modified Patek Philippe Nautilus (Model 5740G – Perpetual Calendar, “Blue Blood”)
Below are the essential features of this top‑tier modified watch:
1. Model & Nickname
- Model: Patek Philippe 5740G Nautilus – the “blue‑blooded nobleman” of the Nautilus family (perpetual calendar)
2. Configuration – Mixed Original & Aftermarket
- Dial: Original genuine – identified and confirmed by an appraisal center (meets genuine craftsmanship)
- Hands: Not original – developed with original data and made with aftermarket replacement parts (appraisal showed “hands do not meet genuine craftsmanship”)
- Moon phase: Original genuine – complies with genuine process
- Movement: Pure original Patek 240 perpetual calendar movement – very expensive (over 200,000 yuan just for the movement)
- Case: Custom‑made 18K white gold (platinum look) – developed with original data, matches genuine in case shape, brushing, polishing, thickness
3. Importance of Authentication
- The seller sent the dial, hands, and moon phase to an appraisal center for verification
- When a merchant claims “original accessories,” buyers should insist on independent authentication – it provides guarantees and avoids deception
4. Movement – Genuine Patek 240 Perpetual Calendar
- A pure original movement – price over 200,000 yuan
- Visible through the caseback – craftsmanship is very good
5. Case – 18K White Gold (Precious Metal)
- Developed using original data
- Quality indicators:
- Correct brushing (wire drawing)
- Correct polishing
- Correct case shape and thickness (matches genuine)
- Precious metal hallmarks on the four corners of the caseback: scales, PPC, dog head, AU750 – must be in place
6. Strap & Buckle
- Strap: Middle beads have a raised feeling with good three‑dimensionality – not loose (though this particular watch shows some wear as it is second‑hand)
- Buckle: Calatrava logo – very three‑dimensional; inside the buckle has the full spelling of “PP” and precious metal marks (AU750, PPC)
7. Overall Assessment
- This configuration (genuine dial, genuine moon phase, genuine perpetual calendar movement, 18K white gold case) represents the best and coolest modification for the 5740G Nautilus
- The hands are aftermarket, but the most critical components are original
8. Key Quality Checklist for PP 5740G
| Component | What to Look For |
|---|---|
| Dial | Original genuine – verified by appraisal |
| Moon phase | Original genuine – verified |
| Hands | Aftermarket (or upgrade to genuine if available) – must be high‑quality replacement |
| Movement | Genuine Patek 240 perpetual calendar (very expensive) |
| Case material | 18K white gold (precious metal) – correct weight and feel |
| Case finishing | Correct brushing, polishing, thickness, case shape |
| Caseback hallmarks | Scales, PPC, dog head, AU750 – deep and clear |
| Strap | Raised middle beads, good 3D, not loose |
| Buckle | Calatrava logo 3D; inside: PP spelling, AU750, PPC marks |
| Authentication | Independent appraisal strongly recommended for genuine parts |
Concluding Comment
This video presents a realistic, transparent look at a high‑end modified Patek Philippe 5740G Nautilus – the perpetual calendar “blue blood” model. Unlike many videos that claim “all original accessories,” here Bozwatch openly shares the appraisal results: the dial and moon phase are genuine, but the hands are aftermarket. The movement, however, is a pure original Patek 240 perpetual calendar – a component that costs over 200,000 yuan by itself.
Strengths:
- Honesty about parts – not everything is original; the hands are replacement parts. This transparency is rare and valuable.
- Authentication is key – the watch was sent to an appraisal center, and the results are shown. Buyers are advised to do the same when merchants claim original parts.
- Genuine perpetual calendar movement – the most complex and expensive part of a 5740G. A genuine 240 perpetual calendar movement is a true achievement in watchmaking and will perform all functions (date, day, month, leap year, moon phase) correctly.
- 18K white gold case – developed from original data, with correct brushing, polishing, thickness, and proper hallmarks (scales, PPC, dog head, AU750). This ensures correct weight and color.
- Strap and buckle – correct raised middle beads, good three‑dimensionality, Calatrava logo, and inner engravings.
Weaknesses / Considerations:
- Hands are aftermarket – while a minor detail compared to the dial and movement, purists may notice under magnification. The buyer could upgrade to genuine hands later.
- Cost is astronomical – a genuine Patek 240 perpetual calendar movement alone exceeds 200,000 yuan, plus an 18K gold case, plus genuine dial and moon phase. This build is not for budget‑conscious buyers.
- Still an unauthorized replica – even with genuine movement and dial, the case and bracelet are aftermarket and carry Patek trademarks without permission.
- Second‑hand wear – the example shown has some wear; new builds would be in better condition.
Final verdict: This modified 5740G represents the pinnacle of “franken” Nautilus builds – combining a genuine Patek perpetual calendar movement (the heart of the watch) with genuine dial and moon phase, housed in a well‑made 18K white gold case. The only aftermarket component visible on the front is the hands, which are high‑quality replacements. For a collector who wants a 5740G – a watch that in genuine form costs well over 200,000 USD and is extremely rare – this build offers an alternative that is still very expensive but significantly less than the authentic version. The key takeaway from this video is the importance of independent authentication – Bozwatch actually did it and showed the results, proving that not every claimed “genuine” part is genuine. Buyers considering such a high‑end modification should follow this example and insist on third‑party verification of all claimed original components. For those with the budget and the willingness to accept an aftermarket case and hands, this is arguably the best 5740G modification available.
Hello everyone, this is Bozwatch Watch Talk.
Every watch is a work of art, a testament to time, and I am a fan of them. I also hope that watch enthusiasts can avoid pitfalls and find their own “Bole” (discerning patron).
Some fans later messaged me, wanting to buy the current market’s “blue‑blooded noble” of the Nautilus family – the Patek Philippe 5740G Nautilus. They asked me to make a video with them to see what the best modified and upgraded 5740G on the market looks like.
Today, I spent my own money to find such a PP 5740G Nautilus from a customer. This Nautilus is the top‑tier 5740G – made using original genuine accessories, a genuine movement, and an 18K white gold case.
When I was sourcing this watch, I also sent it to an appraisal center. You can see the report: the dial meets genuine craftsmanship, the hands do not meet genuine craftsmanship, and the moon phase does meet genuine craftsmanship. I wasn’t sure whether the hands were original accessories, so the dial, hands, and moon phase were all authenticated.
This means that when you assemble a Nautilus like this, if a merchant tells you it’s upgraded with original accessories, it’s best to go through such an authentication process. Because with authentication, you have some guarantees, right?
For this PP 5740G Nautilus, the hands are not original accessories – they are developed with original data and made with aftermarket parts. But its most important components – the dial, moon phase, and movement – are all upgraded with genuine parts. Especially the movement.
This movement is a pure original double‑P 240 perpetual calendar movement. Its price is over 200,000 yuan – a very, very expensive movement. So for a 5740G Nautilus, it is upgraded with a pure original 240 perpetual calendar movement. Look at the back – you can see it. This is the original movement – the craftsmanship is excellent.
Now, for a watch like the 5740G Perpetual Calendar Nautilus, the case must be made of precious metal. So we upgraded it with original data to produce an 18K white gold case. For this platinum‑colored case, the craftsmanship matches the original – especially the brushing, polishing, case shape, and thickness. All must be consistent with the genuine.
Also, the precious metal hallmarks on the caseback – such as the scale, PP mark, dog head, and AU750 on the four corners – must be perfectly executed.
Now the strap. Since this is a customer’s watch, it has some wear and tear. But generally speaking, you can see that the strap’s raised center beads and three‑dimensional feel are very good – not loose. This is the strap.
Now look at the buckle. The buckle has the Calatrava logo – still very three‑dimensional – very good. Open the buckle and look inside – there is the full spelling of Patek Philippe. On the back, there are also precious metal marks – AU750 and the PP mark. These precious metal hallmarks are all quite well done.
Because this is a second‑hand watch, I didn’t show too much of the case craftsmanship. But the point is: when you choose a PP 5740G Nautilus, you can opt for the original dial, original moon phase, original hands, original movement, and then have it made with an 18K platinum/white gold case. This configuration is the best, the most ultimate modification.
This is the Patek Philippe Nautilus PP 5740G – the blue‑blooded noble of the Nautilus family.
If you like this watch, you can search for it yourself. That’s all for today’s Bozwatch video. If you like Bozwatch’s videos, please double‑tap to like and follow me. See you next time.