Summary of Key Points about the Modified Audemars Piguet Royal Oak Chronograph (Model 26331OR – Coffee Brown Dial, 18K Gold Case)
Based on the latest video transcript (focusing on the AP 26331OR coffee brown dial), here are the essential features of this top‑tier modified watch.
1. Model & Material
- Model: Audemars Piguet 26331OR Royal Oak Chronograph – coffee (chocolate) brown dial
- All visible rose gold parts are made of real 18K solid gold (AU750) – same as original
- Case and strap developed through original data, 3D modeling, five‑axis CNC, then custom‑made in 18K gold
2. Weight
- Total weight: 250 grams (half a jin / ~0.55 lbs) – very heavy, exactly matches the genuine
- Weight is a critical indicator of a real gold watch
3. Surface Accessories – Original Genuine (Premium)
- Dial, hands, and date wheel are original genuine accessories for upgrade and customization
- Dial: Coffee/chocolate color; tapisserie pattern and sunburst radial lines are excellent; fonts meet original craftsmanship
- Hands: All six hands are original – central axis effect from the side matches genuine
- Date wheel: Square date that fills the entire window – original
- Authentication: Original parts can be sent to domestic authoritative agencies (e.g., Yuyu Xinhua, Xu Butian) for identification. Bozwatch strongly advises authentication for peace of mind.
- Budget option: If budget is tighter, aftermarket parts can be used instead
4. Movement – Original FP 1185 (Genuine)
- The AP 26331OR has a solid caseback (engraved with “Royal Oak” and three‑dimensional relief) – you cannot see the movement
- Uses an original FP 1185 movement (genuine, base of the 2385 calibre)
- Since the caseback is solid, the movement is not visible – this makes the watch more cost‑effective while still achieving all functions
- Chronograph functions:
- 6 o’clock – small seconds sub‑dial
- 9 o’clock – chronograph minute counter
- 3 o’clock – chronograph hour counter
- Large central hand – chronograph seconds hand
- Operation: Top pusher starts, top pusher again pauses, bottom pusher resets – works correctly
5. Case Craftsmanship – 18K Gold
- Brushed surface: Very, very delicate
- Side brushing: Also delicate
- Thickness: Exactly the same as the original
- Caseback: Three‑dimensional relief perfectly carved; AU750 logo, AP logo, and engravings very clear
- Dog head and scale on the side: Engraved very well
6. Strap & Buckle
- Strap thickness: Gradual thinning from top (near lugs) to bottom (near clasp) – matches original process
- Buckle: Large AP logo very clear, very deep – excellent
- From the side, the gradual thinning is even more visible – matching original and representing the highest level on the market
7. Popularity & Variants
- The AP 26331OR is very popular in the modification market
- Available variants: steel version (white/black dials), gold version (brown dial) – choose according to preference
8. Key Quality Checklist for AP 26331OR Coffee Brown
| Component | What to Look For |
|---|---|
| Case/strap material | Real 18K solid gold (AU750) – original data, 5‑axis CNC |
| Weight | ~250g |
| Dial | Original genuine – coffee/chocolate color, correct tapisserie, sunburst, fonts |
| Hands | Original genuine – correct central axis |
| Date wheel | Original genuine – square, fills window |
| Movement | Original FP 1185 (genuine) – solid caseback, hidden, chronograph works |
| Case finishing | Very delicate brushing, correct thickness, clear engravings (AP, AU750, dog head, scale) |
| Caseback relief | Perfectly carved |
| Strap | Gradual thinning (top thick → bottom thin) |
| Buckle | Large, deep AP logo, clear |
Concluding Comment
This video focuses on the Audemars Piguet 26331OR coffee brown dial – a rose gold Royal Oak Chronograph with a solid caseback. The modified version uses real 18K solid gold for the case and strap (250g, matching genuine weight), an original genuine dial, hands, and date wheel (ensuring perfect front‑face authenticity), and an original genuine FP 1185 movement (hidden by the solid caseback, but delivering correct chronograph functions and thickness). The solid caseback is a major advantage: because the movement is not visible, the watch has fewer potential tells. The case finishing (delicate brushing, clear engravings, perfect caseback relief) and the gradually thinning strap are executed to a high standard. The buckle has a large, deep AP logo.
Strengths:
- Real 18K gold case/strap – correct weight (250g) and material.
- Original genuine dial, hands, date – front face is virtually indistinguishable from genuine; can be authenticated.
- Solid caseback advantage – movement hidden, so no movement‑related tells.
- Original genuine FP 1185 movement – ensures correct thickness and reliable chronograph function.
- High‑quality case finishing – delicate brushing, clear engravings (AU750, dog head, scale), perfect caseback relief.
- Correct strap taper – gradual thinning from top to bottom, matches original.
- Authentication possible – original parts can be tested by authoritative agencies.
Final verdict: The modified AP 26331OR coffee brown dial is an excellent choice for collectors who want a rose gold Royal Oak Chronograph with a solid caseback. Because the movement is hidden, the original genuine front parts (dial, hands, date) and the real gold case solve almost all tells. The weight (250g), finishing, and strap taper are correct. For those with the budget to source original parts and an 18K gold case, this watch will pass casual and even close front‑face inspection. Bozwatch’s emphasis on weight, original accessories, solid caseback, and gradual strap thinning provides a solid checklist. This is the “spend less, get a near‑perfect solid‑caseback AP” proposition. As always, independent verification of gold purity (XRF) and authentication of original parts is recommended. This is a top‑tier AP modification for serious collectors.
Hello everyone, this is Bozwatch Reviews.
Every watch is a work of art, a testament to time, and I am a fanatic who is obsessed with them. I also hope that watch enthusiasts can avoid pitfalls and find their own “Bole” (discerning patron).
Later, fans sent me private messages wanting to buy the best modified Audemars Piguet 26331OR coffee brown dial currently on the market. They asked me to make a video to authenticate it. So today, I paid out of my own pocket to buy a top‑modified AP 26331OR coffee brown dial from a merchant.
For this watch, every rose gold part you can see with your naked eye is made of the same material as the original – customized with 18K solid gold. So this watch feels very heavy in the hand.
Let’s weigh it, as usual. For a watch made of 18K gold, you can see it weighs 250 grams – half a jin (about 0.55 lbs). This watch is really very heavy, especially for a rose gold piece. It is customized with 18K gold, completely matching the original material – AU750 rose gold. Its case and strap are made through original data, 3D modeling, five‑axis CNC, and customized with 18K gold, so the material and color are perfectly consistent.
Now, the surface accessories – dial, hands, and date wheel – are all original genuine accessories for customization and upgrade. Of course, if your budget is tighter, you can also use aftermarket parts – that’s fine too. But if you use original accessories for the upgrade, from the front, no one can tell there’s any issue.
Original dials, original hands, and original date wheels can be sent to more authoritative domestic appraisal agencies – such as Yuyu Xinhua or Xu Butian – for identification. I want to emphasize: if you choose to upgrade with original accessories, it’s best to have them appraised. Only with authentication can you have peace of mind.
Let’s look at the texture of the original accessories. First, you can see the coffee‑colored, chocolate‑colored dial. The tapisserie pattern and sunburst radial lines are excellent. The fonts meet original craftsmanship. The hands – all six hands – are original. Look at the central axis effect from the side – that’s the genuine central axis. The date wheel is a square date that fills the entire window – also original.
Now, the movement. The AP 26331OR is very popular in the market because it has a solid caseback – you can’t see the movement inside. The caseback is engraved with “Royal Oak” and a three‑dimensional relief. For this watch, we currently use an original FP 1185 movement – the genuine movement, a base of the 2385 movement. Since you can’t see the movement, this makes it more cost‑effective while still achieving all functions.
What functions does it have? Press the top pusher – the large chronograph seconds hand starts moving. See? Press again to pause. Press the bottom pusher to reset.
- 6 o’clock – small seconds sub‑dial
- 9 o’clock – chronograph minute counter
- 3 o’clock – chronograph hour counter
It’s a chronograph watch.
In fact, the AP 26331OR is very popular in the modification market. It can be made in steel or gold. The steel version comes in white and black; the gold version comes in brown. It mainly depends on your preference.
Finally, let me show you the craftsmanship of the 18K gold case. The brushed surface is very, very delicate. The side is also brushed. Its thickness is exactly the same as the original. The caseback’s three‑dimensional relief is perfectly carved. The AU750 logo, AP logo, and caseback engravings are all very clear. The dog head and scale on the side are also engraved very well.
Now look at the strap. From the side, its thickness actually changes – it gradually thins from top to bottom. Have you noticed? That matches the original process – a gradual thinning from thick to thin. The large AP logo on the buckle is very clear and very deep – excellent. From the side, you can see the gradual thinning even more clearly – matching the original process and representing the highest level on the market.
This is an AP 26331OR coffee dial – upgraded with 18K gold, original genuine dial, hands, and date wheel, customized with AU750 18K gold – a complete watch upgrade.
If you like this watch, you can also contact Bozwatch. If you like Bozwatch’s videos, please double‑tap to like and follow. See you next time.