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1Fix the driver behind crashes, sound loss and screen glitches2Clear out junk files and repair common Windows errors3Scan for outdated or missing drivers - takes under a minuteThe release brings two distinct sizes to Hamilton’s aviation-inspired Pilot line: a 36mm automatic with a time-only dial, and a 42mm automatic with day and date. The practical choice is between the smaller case and simpler display or the larger watch with a fuller calendar; dial and strap or bracelet combinations depend on the specific reference.
What the release includes
Time+Tide’s launch coverage lists four references in the 36mm Khaki Aviation Pilot Auto family—H76245840, H76215850, H76215140 and H76215130—and three in the 42mm Khaki Aviation Pilot Day-Date family—H64635140, H64635560 and H64635550. These names describe aviation-inspired wristwatches; the available product information does not establish either as a certified flight instrument. Time+Tide’s launch coverage is the source for the family-level release details.
How the 36mm and 42mm compare
| Feature | Pilot Auto 36mm | Pilot Day-Date 42mm |
|---|---|---|
| Display | Time only, according to Time+Tide’s launch coverage. | Day and date; confirmed for reference H64635550 by Hamilton. |
| Movement | H-10 automatic, as reported in launch coverage. | H-30 automatic; confirmed for H64635550 on Hamilton’s product page. |
| Power reserve | 80 hours, as reported in launch coverage. | 80 hours; confirmed for H64635550 by Hamilton. |
| Reported dimensions | 36.6mm diameter and 45.1mm lug-to-lug, reported in launch coverage. | 42.6mm diameter and 51mm lug-to-lug, reported in launch coverage. Hamilton lists a 42mm case for H64635550. |
| Lug width | 18mm, as reported in launch coverage. | 20mm; confirmed for H64635550 by Hamilton. |
| Reported dial colors | Sunburst blue, silver and black. | Matte green, blue and silver. |
| Attachment options | Vary by reference; check the exact listing. | Vary by reference; check the exact listing. |
The reported diameter and lug-to-lug figures come from launch coverage, not independently confirmed official specifications for every reference. Hamilton’s official page for reference H64635550 specifies a 42mm stainless-steel case, 11.85mm thickness, sapphire crystal, 20mm lug width, 10 bar (100m) water resistance and an open case back. Hamilton labels that reference part of a past collection on the cited regional page, which does not establish availability for every reference or market.
Which size suits your preference?
Choose the 36mm Pilot Auto for a smaller footprint
The 36mm model is the compact, time-only option. Its reported 36.6mm diameter and 45.1mm lug-to-lug offer a smaller footprint than the 42mm family’s reported dimensions. Its H-10 movement and 80-hour reserve are reported by launch coverage; exact official specifications for each 36mm reference are not established here.
#1 Best Overall
- AUTOMATIC MOVEMENT: Swiss H-40 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 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.
- READY TO TAKE FLIGHT: A robust 42mm stainless steel case and a bold black dial deliver reliability and precision. With sapphire crystal for clear visibility, this watch is tailored to meet the demands of professional pilots and aviation enthusiasts.
- 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.
Choose the 42mm Pilot Day-Date for calendar information
The 42mm model adds both day and date and uses the H-30 automatic movement, according to launch coverage. Hamilton confirms those functions, the H-30 caliber and an 80-hour reserve for H64635550. The larger reported case and 51mm lug-to-lug give it more wrist presence than the 36mm option.
Match the reference to the dial and attachment
The color choices are family-level descriptions, not a guarantee that every color is available with every strap or bracelet. Time+Tide reports sunburst blue, silver and black dials for the 36mm family, and matte green, blue and silver for the 42mm family. For example, authorized retailer listing Fratello’s H64635560 listing describes an olive-green dial with a dark-brown leather strap and enlarged numerals. That description applies to that reference and listing, not all 42mm versions.
Rank #2
- 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 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.
- READY TO TAKE FLIGHT: A robust 38mm stainless steel case and a bold black dial deliver reliability and precision. With sapphire crystal for clear visibility, this watch is tailored to meet the demands of professional pilots and aviation enthusiasts.
- 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.
Before comparing listings, match the full reference number and confirm the dial, strap or bracelet, seller, region and current stock. A family name or photograph alone may not identify the exact configuration.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Price and availability
Current prices and availability by region are not established by the cited launch coverage or Hamilton product page. Check Hamilton’s regional site or an authorized retailer for the specific reference; Hamilton’s page marks H64635550 as part of a past collection in that region, which should not be generalized to the other references or markets.
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Quick Recap
Best Value
- AUTOMATIC MOVEMENT: Swiss H-40 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 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.
- READY TO TAKE FLIGHT: A robust 42mm stainless steel case and a bold black dial deliver reliability and precision. With sapphire crystal for clear visibility, this watch is tailored to meet the demands of professional pilots and aviation enthusiasts.
- 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
- AUTOMATIC MOVEMENT: Swiss H-30 movement with 80-hour power reserve and day-date functionality for practical, everyday use. Precision engineering meets reliability for seamless timekeeping.
- 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.
- READY TO TAKE FLIGHT: A robust 45mm stainless steel case and a bold blue dial deliver reliability and precision. With sapphire crystal for clear visibility, this watch is tailored to meet the demands of professional pilots and aviation enthusiasts.
- 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.
Rank #3
- AUTOMATIC MOVEMENT: Swiss H-30 movement with 80-hour power reserve and day-date functionality for practical, everyday use. Precision engineering meets reliability for seamless timekeeping.
- 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.
- READY TO TAKE FLIGHT: A robust 45mm stainless steel case and a bold black dial deliver reliability and precision. With sapphire crystal for clear visibility, this watch is tailored to meet the demands of professional pilots and aviation enthusiasts.
- 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.
