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Hamilton’s current US Jazzmaster collection lists Open Heart Auto watches in 36mm, 40mm and 42mm sizes, with dial colours and specifications varying by reference. The brand’s Press Lounge lists a Jazzmaster Open Heart announcement dated February 12, 2026; its public listing does not provide a full catalogue of launch variants. Here’s what the current official listings confirm.
What Hamilton announced—and what the current collection shows
Hamilton’s Jazzmaster Press Lounge lists a “February 12, 2026 Jazzmaster Open Heart” announcement. The listing establishes the announcement date, but does not itemize every size, colour or reference in the public page content reviewed.
The live Hamilton US Jazzmaster collection currently shows Open Heart Auto variants in 36mm, 40mm and 42mm. That is a current collection snapshot, not proof that every size or colour was introduced on the announcement date or is available in every market.
Confirmed references: sizes, colours and specifications
These official examples illustrate the range, but do not establish a complete size-by-colour matrix. Check the exact reference for its dial, bracelet or strap, and current regional availability.
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#1 Best Overall
Hamilton Jazzmaster Open Heart Automatic Men's Watch, 40mm Case
- AUTOMATIC MOVEMENT: Swiss H-10 movement with 80-hour reserve ensures consistent performance. Experience precision that matches both daily tasks and adventures, a testament to Swiss craftsmanship in automatic timekeeping.
- WATER RESISTANT TO 50M: Withstands 5 bar (50 meters), ideal for swimming and outdoor pursuits. Perfect for those who demand resilient accessories that accompany them confidently on their explorative journeys.
- CONTEMPORARY SOPHISTICATION: Featuring a 40mm stainless steel case and a sleek blue dial, this modern watch combines heritage with minimalist design. Complete with sapphire crystal , it’s the perfect expression of style and quality.
- 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.
| Reference | Size and dial | Notable listed details | Hamilton US price shown |
|---|---|---|---|
| H32705140 | 42mm; blue aventurine | H-10 automatic; 80-hour power reserve; Nivachron balance spring; stainless-steel case and bracelet; sapphire crystal; exhibition case back; 5 bar (50m) water resistance; 22mm lug width. | $1,295 when reviewed October 8, 2026; live US listing, subject to change. |
| H32675540 | 40mm; blue | H-10 automatic; 80-hour power reserve; Nivachron balance spring; stainless-steel case; sapphire crystal; 5 bar (50m) water resistance; 20mm lug width. | $1,245 when reviewed October 8, 2026; live US listing, subject to change. |
| H32705131 | 42mm; black | H-10 automatic; 80-hour power reserve; stainless-steel bracelet; 5 bar (50m) water resistance; 22mm lug width. | $1,295 when reviewed October 8, 2026; live US listing, subject to change. |
Hamilton describes the H32705140 as “Offering a glimpse of its powerful inner mechanics, the Jazzmaster Open Heart lets precision take center stage with a new 42mm dial.” That is product-page wording, not a statement attributed to a named designer or executive.
How to compare the models before choosing
- Start with the reference number. Use it to confirm you are comparing the same specific watch across Hamilton’s product and local retailer listings.
- Choose case size and dial together. The confirmed examples include a 40mm blue-dial model and 42mm blue-aventurine and black-dial models. They do not show that every dial comes in every size.
- Check the bracelet or strap on that reference. The listed 42mm examples have stainless-steel bracelets; do not assume an identical configuration across the wider collection.
- Confirm lug width before buying a strap. The cited 40mm reference uses a 20mm lug width, while the two 42mm examples use 22mm. Verify against the exact watch before ordering an accessory.
- Check local price and availability. Hamilton’s US collection and product pages showed prices from $1,195 to $1,295 across its current Open Heart variants when reviewed October 8, 2026. This is a volatile US listing observation, not a universal price; confirm the exact reference and market.
Movement, materials and water resistance
Hamilton lists its H-10 automatic movement and an 80-hour power reserve for the cited references. Specifications also identify a Nivachron balance spring on H32705140 and H32675540. Across the cited examples, Hamilton specifies a stainless-steel case and sapphire crystal, and rates water resistance at 5 bar (50m). These details apply to the references listed above, not automatically to every Open Heart configuration.
Quick Recap
Bestseller No. 1
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Bestseller No. 4
Bestseller No. 5
Best Value
Hamilton Jazzmaster Automatic Men's Watch, 42 Stainless Steel Case
- AUTOMATIC MOVEMENT: Swiss H-10 movement with 80-hour reserve ensures consistent performance. Experience precision that matches both daily tasks and adventures, a testament to Swiss craftsmanship in automatic timekeeping.
- WATER RESISTANT TO 50M: Withstands 5 bar (50 meters), ideal for outdoor pursuits. Perfect for those who demand resilient accessories that accompany them confidently on their explorative journeys.
- CLEAR AND TIMELESS DESIGN: 42mm stainless steel case with a refined 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.
Rank #4
Hamilton Jazzmaster Open Heart Automatic Men's Watch, 42mm Case
- AUTOMATIC MOVEMENT: Swiss H-10 movement with 80-hour reserve ensures consistent performance. Experience precision that matches both daily tasks and adventures, a testament to Swiss craftsmanship in automatic timekeeping.
- WATER RESISTANT TO 50M: Withstands 5 bar (50 meters), ideal for swimming and outdoor pursuits. Perfect for those who demand resilient accessories that accompany them confidently on their explorative journeys.
- CONTEMPORARY SOPHISTICATION: Featuring a 42mm stainless steel case and a sleek beige dial, this modern watch combines heritage with minimalist design. Complete with sapphire crystal , it’s the perfect expression of style and quality.
- PREMIUM MATERIALS: Leather strap 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.
Rank #3
Hamilton Jazzmaster Open Heart Automatic Men's Watch, 42mm Case
- AUTOMATIC MOVEMENT: Swiss H-10 movement with 80-hour reserve ensures consistent performance. Experience precision that matches both daily tasks and adventures, a testament to Swiss craftsmanship in automatic timekeeping.
- WATER RESISTANT TO 50M: Withstands 5 bar (50 meters), ideal for swimming and outdoor pursuits. Perfect for those who demand resilient accessories that accompany them confidently on their explorative journeys.
- CONTEMPORARY SOPHISTICATION: Featuring a 42mm stainless steel case and a sleek black dial, this modern watch combines heritage with minimalist design. Complete with sapphire crystal , it’s the perfect expression of style and quality.
- PREMIUM MATERIALS: Leather strap 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.
Rank #2
Hamilton Jazzmaster Automatic Mens Watch, 42mm Stainless Steel, Blue Dial
- AUTOMATIC MOVEMENT: Swiss H-10 movement with 80-hour reserve ensures consistent performance. Experience precision that matches both daily tasks and adventures, a testament to Swiss craftsmanship in automatic timekeeping.
- WATER RESISTANT TO 50M: Withstands 5 bar (50 meters), ideal for outdoor pursuits. Perfect for those who demand resilient accessories that accompany them confidently on their explorative journeys.
- CLEAR AND TIMELESS DESIGN: 42mm stainless steel case with a refined 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.
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.
