BLAUE ACHT
Pros & cons
What works
- Weighs 68 grams — 12g lighter than stainless steel equivalents
- Sapphire crystal resists scratches 3x better than mineral glass
- Blue Super-LumiNova® glows visibly for 8 continuous hours
- 72-hour power reserve outperforms many 40-hour competitors
Trade-offs
- 20m water resistance limits swimming use — avoid full immersion
- No quick-set date complication requires manual cycling
- Bioceramic shows micro-scratches more visibly than matte finishes
Video review
Expert review
Specs at a glance
About this product
What is the BLAUE ACHT? It's a bold bioceramic watch with royal blue tones and a hand-wound movement positioned defiantly at 12 o'clock. This 40mm timepiece reimagines classic watch geometry while delivering ChromaTempo's signature color-saturated confidence. The sapphire crystal face resists scratches while the blue Super-LumiNova® glows for 8 continuous hours in darkness.
What is the BLAUE ACHT used for?
It's designed for making color statements in professional and social settings. The 2 bar water resistance handles rain and splashes, but I'd avoid swimming. Wear it with navy suits or white summer linens—this blue commands attention without shouting.
How does the BLAUE ACHT compare to GREEN EIGHT?
The BLAUE ACHT offers cooler, more formal versatility than GREEN EIGHT's vibrant energy. While both share the same 40mm case and 72-hour power reserve, BLAUE ACHT's royal blue pairs better with corporate attire. GREEN EIGHT excels at casual weekend wear, but BLAUE ACHT transitions seamlessly from boardroom to bar.
What does it weigh and what are the dimensions?
It weighs 68 grams on its bioceramic bracelet, with a 40mm width and 8.4mm thickness. The slender profile slips easily under shirt cuffs, and the entire package feels substantial without weighing down your wrist. After wearing it for three consecutive days, I barely noticed it was there.
Who is this NOT for?
It's not for serious divers or those who prefer minimalist aesthetics. The 20-meter water resistance won't withstand pool laps, and the bold blue color demands outfit consideration. If you want something subtle, check out HUIT BLANC instead—it's our quietest statement piece.
What's in the box?
You get the watch, one extra bioceramic link, and our signature chroma-matched microfiber cloth. The presentation box includes a tool for resizing the bracelet in under 2 minutes. No battery needed—this mechanical wonder winds with 15 clockwise crown rotations.
Is the BLAUE ACHT worth it at $400?
Absolutely, if you value color intelligence and mechanical craftsmanship. The sapphire crystal alone justifies the price point compared to mineral glass alternatives. Pair it with advice from our guide on How to Match Watch Color to Your Daily Outfit Vibe for maximum style impact.
Key attributes
| Width | 40 mm |
| Thickness | 8.4 mm |
| Crystal | Sapphire with anti-reflective coating |
| Movement | Hand-wound SISTEM51 |
| Water Resistance | 2 bar (20 meters) |
| Case Material | Bioceramic |
| Weight | 68 g |
| Luminescence | Grade A Super-LumiNova® blue |
Specifications
| Width | 40 mm |
| Thickness | 8.4 mm |
| Crystal | Sapphire crystal with anti-reflective coating |
| Movement | Hand-wound SISTEM51 movement with Lépine-style layout |
| Water Resistance | 2 bar (20 meters) |
| Case Material | Bioceramic |
| Bezel Material | Bioceramic |
| Crown Position | 12 o'clock |
| Luminescence | Grade A Super-LumiNova® (blue emission) |
Materials
- Bioceramic
- Sapphire crystal
- Calfskin
- Super-LumiNova
Frequently asked questions
- Does it fit small wrists?
- The bracelet adjusts down to 6.25 inches circumference with included links removed. For wrists smaller than 6 inches, consider OTG ROZ with its slim 36mm case. Installation takes about 90 seconds with the included tool.
- How long does shipping take?
- US orders ship via FedEx Ground with 3-5 business day delivery. International orders typically arrive within 7-10 business days. We ship from our Milan distribution center using DHL Express for European customers.
- Can I return it if it doesn't fit?
- Yes, we offer 30-day returns for unworn items with original packaging. The return process takes 5-7 business days for refund processing. Exchanges for other models like ORENJI HACHI are prioritized within 48 hours.
- Does this work with leather straps?
- It accepts standard 20mm quick-release straps from brands like Hadley Roma. The lug width accommodates most third-party options. Swapping takes about 45 seconds with our tool-free system.