Hamilton Khaki Aviation Pilot Day Date Auto H64635140
Ref. H64635140 · Blue dial · In production
- Case42 mm
- Thick12.1 mm
- Water res.100 m
- MovementAutomatic
- CrystalSapphire
Hamilton Khaki Aviation Pilot Day Date Auto H64635140 size, specs and price at a glance
The Hamilton Khaki Aviation Pilot Day Date Auto H64635140 is 42 mm wide and 12.1 mm thick. Hamilton does not publish its lug-to-lug length. It takes 20 mm straps and ships on a bracelet. Inside is the H-30 automatic calibre, water resistant to 100 m. US list price: $1,125 when we last checked hamiltonwatch.com (3 Nov 2026).
Strap shopping? See our Hamilton lug width chart.
Overview
The Hamilton H64635140 is a sports watch from the Khaki Aviation collection, part of the Khaki Aviation Pilot Day Date Auto family. It has a 42 mm stainless steel case, 12.1 mm thick. Hamilton lists the dial as blue. Inside is an automatic movement (calibre H-30) with 80 h of power reserve. You also get 100 m water resistance, a sapphire crystal and a bracelet.
Who it suits
- Wrists of roughly 16.8–18.7 cm (6.6–7.4 in), by our Watch Finder sizing guide
- Everyday wear including swimming
Strengths
- Sapphire crystal resists scratches
- 80 h power reserve survives a weekend off the wrist
Written by Watch.co from the published specs below. These are not owner reviews.
Full specifications
Case
| Case diameter | 42 mm | hamiltonwatch.com · 3 Nov 2026 |
|---|---|---|
| Thickness | 12.1 mm | hamiltonwatch.com · 3 Nov 2026 |
| Lug-to-lug | Not published by Hamilton | |
| Case material | Stainless steel | hamiltonwatch.com · 3 Nov 2026 |
| Crystal | Sapphire | hamiltonwatch.com · 3 Nov 2026 |
| Water resistance | 100 m | hamiltonwatch.com · 3 Nov 2026 |
Dial
| Dial colour | Blue | hamiltonwatch.com · 3 Nov 2026 |
|---|---|---|
| Date | Day/Date | hamiltonwatch.com · 3 Nov 2026 |
Movement
| Movement type | Automatic | hamiltonwatch.com · 3 Nov 2026 |
|---|---|---|
| Calibre | H-30 | hamiltonwatch.com · 3 Nov 2026 |
| Power reserve | 80 h | hamiltonwatch.com · 3 Nov 2026 |
Strap / Bracelet
| Bracelet / strap | Bracelet | hamiltonwatch.com · 3 Nov 2026 |
|---|---|---|
| Lug width | 20 mm | hamiltonwatch.com · 3 Nov 2026 |
Other
| US list price (MSRP) | $1,125 | hamiltonwatch.com · 3 Nov 2026 |
|---|---|---|
| Production status | In production | hamiltonwatch.com · 3 Nov 2026 |
| Style (our classification) | Sports | our classification |
Specs are summarised in our own words from the brand's product page. Each row links its source and the date we checked it. Fields we haven't verified are left out rather than guessed.
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Questions about the Hamilton Khaki Aviation Pilot Day Date Auto H64635140
How big is the Hamilton Khaki Aviation Pilot Day Date Auto H64635140?
The case is 42 mm wide, 12.1 mm thick.
What movement does the Hamilton Khaki Aviation Pilot Day Date Auto H64635140 use?
It uses the H-30 calibre, a automatic movement with 80 h of power reserve.
Can I swim with the Hamilton Khaki Aviation Pilot Day Date Auto H64635140?
Yes. It is rated to 100 m.
Does the Hamilton Khaki Aviation Pilot Day Date Auto H64635140 have a date?
Yes, it shows the day and date.
How much is the Hamilton Khaki Aviation Pilot Day Date Auto H64635140?
The US list price was $1,125 on hamiltonwatch.com when we checked on 3 Nov 2026. Prices change, so check before you buy.
Will the Hamilton Khaki Aviation Pilot Day Date Auto H64635140 fit my wrist?
By our sizing guide it sits best on wrists of about 16.8–18.7 cm (6.6–7.4 in). Use the fit checker on this page to test your own wrist.
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