Hamilton’s 2025 Intra-Matic Auto Chrono trio puts a black PVD-coated case and dark dial at the center of the design, then picks out the tachymeter scale and central chronograph hand in white, yellow, or orange. The three references are H38446730, H38446731, and H38446732. They retain the modern automatic H-31 caliber—not the historic Calibre 11.
Three black watches, three accent colors
The shared design is a black PVD-coated stainless-steel case, black dial, and blackened hands and markers with luminous material. The accent treatment differentiates the references: white for H38446730, yellow for H38446731, and orange for H38446732. Monochrome’s March 2025 launch report describes the color on the tachymeter scale and central chronograph hand, with perforated black leather racing straps; the yellow and orange versions have matching colored underlining on the straps. Monochrome Watches also describes a curved sapphire crystal with anti-reflective coating.
Hamilton frames the collection as drawing on the model’s racing roots and the original Intra-Matic design. The dark treatment changes the look without changing the basic proposition: a vintage-inspired automatic chronograph with a tachymeter.
Reference numbers and specifications
| Reference | Accent | Official price or availability checked October 8, 2026 |
|---|---|---|
| H38446730 | White | £2,265 displayed on Hamilton’s UK product page |
| H38446731 | Yellow | Not stated on the accessed Hamilton pages |
| H38446732 | Orange | $2,625 displayed on Hamilton’s US product page; page showed “In stock” |
The UK listing for H38446730 is the most complete official specification set available here. Its figures should not automatically be assumed for every regional listing or variant.
#1 Best Overall
- Featuring a Black Band, Silver-tone Case, Scratch Resistant Sapphire Crystal
- - Back: Stainless steel back
- - Case Colour: Silver
- - Case Material: Stainless Steel
| H38446730 specification | Hamilton UK listing |
|---|---|
| Case diameter | 40mm |
| Thickness | 14.45mm |
| Lug-to-lug | 49mm |
| Lug width | 20mm |
| Case material | Stainless steel with black PVD coating |
| Crystal | Sapphire |
| Water resistance | 10 bar / 100m |
| Movement and reserve | Automatic Caliber H-31; 60 hours |
| Functions | Chronograph, date, and tachymeter |
Specifications and UK price are from Hamilton’s H38446730 UK listing, accessed October 8, 2026. The US price and availability shown above are from Hamilton’s H38446732 US listing, accessed the same date. Price and inventory depend on market and can change.
H-31 is modern, not Calibre 11
Hamilton identifies the movement as automatic Caliber H-31. Monochrome reports that it is based on the ETA/Valjoux 7753, with 27 jewels, a frequency of 28,800 vibrations per hour, a reworked gear train, and a Nivachron balance spring. It explicitly distinguishes H-31 from the 1969 Chrono-Matic, also known as Calibre 11; the modern watch does not contain that historic movement. Monochrome’s launch coverage provides those movement details.
Rank #2
- AUTOMATIC MOVEMENT: Swiss H-31 automatic chronograph movement provides a 60-hour power reserve, ensuring consistent and precise performance—a testament to Swiss craftsmanship, ready for both daily tasks and adventures.
- WATER RESISTANT TO 100M: Withstands 10 bar (100 meters), ideal for swimming and outdoor pursuits. Perfect for those who demand resilient accessories that accompany them confidently on their explorative journeys.
- CLEAR AND TIMELESS DESIGN: 40mm stainless steel case with a refined white dial and an elegant stainless steel bracelet. Equipped with sapphire crystal and classic detailing, it blends vintage charm with modern functionality for any occasion.
- PREMIUM MATERIALS: Stainless steel bracelet with folding clasp offers day-long comfort. The clean lines and sophisticated design make it the perfect accessory for both casual wear and formal attire, merging functionality with fashion.
- RICH HERITAGE: Over a century of Hamilton's legacy in field watches, admired for precision. Originally designed for WWI soldiers, these timepieces combine rugged durability with history, showcasing Hamilton's commitment to quality and innovation.
How the Intra-Matic connects to chronograph history
Monochrome traces the design lineage to Project 99, a late-1960s collaboration involving Büren, Heuer, Breitling, and Dubois-Depraz. The resulting automatic Chrono-Matic/Calibre 11 chronograph was presented in 1969; Hamilton’s Chronograph A and B were also part of the period’s design story. The modern Intra-Matic 68 followed in 2017, according to the same account. This is historical context for the design, not a claim that today’s H-31 is the old caliber.
Launch pricing and what the current listings show
When the trio was announced on March 20, 2025, Monochrome listed launch prices of EUR 2,595, CHF 2,295, and USD 2,295, and described the watches as part of Hamilton’s permanent collection. Those are launch-era prices, not a guarantee of today’s local price. The manufacturer pages accessed October 8, 2026 showed £2,265 for H38446730 in the UK and $2,625 for H38446732 in the US. A price or stock status in one country does not establish availability in another.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Rank #3
- AUTOMATIC MOVEMENT: Swiss H-31 automatic chronograph movement provides a 60-hour power reserve, ensuring consistent and precise performance—a testament to Swiss craftsmanship, ready for both daily tasks and adventures.
- WATER RESISTANT TO 100M: Withstands 10 bar (100 meters), ideal for swimming and outdoor pursuits. Perfect for those who demand resilient accessories that accompany them confidently on their explorative journeys.
- CLEAR AND TIMELESS DESIGN: 40mm stainless steel case with a refined green dial and an elegant leather strap. Equipped with sapphire crystal and classic detailing, it blends vintage charm with modern functionality for any occasion.
- PREMIUM MATERIALS: Leather strap with pin buckle offers day-long comfort. The clean lines and sophisticated design make it the perfect accessory for both casual wear and formal attire, merging functionality with fashion.
- RICH HERITAGE: Over a century of Hamilton's legacy in field watches, admired for precision. Originally designed for WWI soldiers, these timepieces combine rugged durability with history, showcasing Hamilton's commitment to quality and innovation.
For launch-period video coverage, Time+Tide’s March 20, 2025 video is titled “New Hamilton Intra-Matic Auto Chrono steers into a fresh all-black look.”
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Which version to consider
Color is the clearest choice between the three: white is the restrained contrast, while yellow and orange make the accent treatment more conspicuous. That is a visual distinction, not a measured legibility result. There is no controlled comparative test here establishing which dial is easiest to read or most comfortable to wear.
Rank #4
- AUTOMATIC MOVEMENT: Swiss H-31 automatic chronograph movement provides a 60-hour power reserve, ensuring consistent and precise performance—a testament to Swiss craftsmanship, ready for both daily tasks and adventures.
- WATER RESISTANT TO 100M: Withstands 10 bar (100 meters), ideal for swimming and outdoor pursuits. Perfect for those who demand resilient accessories that accompany them confidently on their explorative journeys.
- CLEAR AND TIMELESS DESIGN: 40mm stainless steel case with a refined blue dial and an elegant leather strap. Equipped with sapphire crystal and classic detailing, it blends vintage charm with modern functionality for any occasion.
- PREMIUM MATERIALS: Leather strap with pin buckle offers day-long comfort. The clean lines and sophisticated design make it the perfect accessory for both casual wear and formal attire, merging functionality with fashion.
- RICH HERITAGE: Over a century of Hamilton's legacy in field watches, admired for precision. Originally designed for WWI soldiers, these timepieces combine rugged durability with history, showcasing Hamilton's commitment to quality and innovation.
If you are checking fit, use the published dimensions for the exact reference and market listing rather than relying on the 40mm diameter alone. The 49mm lug-to-lug measurement and 14.45mm thickness on H38446730 are useful alongside wrist size and the way you prefer a chronograph to sit. For strap replacement, Hamilton lists a 20mm lug width for that reference; confirm the width, attachment, and compatibility for your own variant before ordering a third-party strap.
Quick Recap
Best Value
- MANUAL WINDING: Designed for precision, this hand-wound watch is powered by the exclusive H-51 mechanical chronograph movement that embodies the core principles of watchmaking, offering an extended 60-hour power reserve.
- WATER RESISTANT TO 100M: Withstands 10 bar (100 meters), ideal for swimming and outdoor pursuits. Perfect for those who demand resilient accessories that accompany them confidently on their explorative journeys.
- CLEAR AND TIMELESS DESIGN: 40mm stainless steel case with a refined white dial and an elegant leather strap. Equipped with sapphire crystal and classic detailing, it blends vintage charm with modern functionality for any occasion.
- PREMIUM MATERIALS: Leather strap with pin buckle offers day-long comfort. The clean lines and sophisticated design make it the perfect accessory for both casual wear and formal attire, merging functionality with fashion.
- RICH HERITAGE: Over a century of Hamilton's legacy in field watches, admired for precision. Originally designed for WWI soldiers, these timepieces combine rugged durability with history, showcasing Hamilton's commitment to quality and innovation.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
Recommended Free Tools
