Hamilton Conservation Auto Chronograph Swiss Watches

The Swiss-American watchmaking brand and the environmental nonprofit organization Conservation International (CI) joined their forces to create a special edition Hamilton Conservation Auto Chronograph (ref. H604160) wrist watch. Presented by CI’s Vice Chair of the Board of Directors… wait for it… Mr. Harrison Ford, the new timekeeper seems to be based on the recently unveiled Hamilton Khaki Pioneer chronograph watch.

The Hamilton Conservation Auto sports a vintage-looking stainless steel case that features a special antimagnetic cage that makes the watch’s self-winding mechanism less prone to magnetic fields and therefore more accurate and reliable.

Modest (by today’s standards) 42 millimeters in diameter, it is equipped with a signature knurled (also known as “coin-edged”) fixed bezel and sports an oversized onion-shaped setting crown that provides the watch with a more classic, even vintage look.

Hamilton Conservation Auto Chronograph special edition automatic watch

The pair of chronograph push-pieces that are placed on their usual spots at 2 and 4 o’clock sport the same “classic” styling.

The basic layout of the dial of the Conservation Auto is also nearly identical to that of the Hamilton Khaki Pioneer chronograph watch, save for the color: instead of charcoal grey, this job is toned in a more “historic” beige color.

Yes, as you can see on the pictures, the watch features a bi-compax layout, which is characteristic of vintage chronographs from the 1930s.

There is a subsidiary seconds indicator at 9 o’clock and a standard 30-minute chronograph counter at 3 o’clock.

You may have already noticed the difference between the hands on the indicators. While the small seconds sub-dial sports a simple stick-shaped hand, the chrono counter has a more prominent arrow-shaped pointer.

Hamilton Conservation Auto Chronograph watch (front view)

However, the main thing of interest here is the ETA Caliber H31 automatic movement that powers the timekeeper.

While the overwhelming majority of watchmaking brands (even the most prominent ones) tend to simply order a base movement to be equipped with a branded rotor, this one indeed sports a number of modifications that make the personalized movement superior to its donor.

Compared to the ETA Valjoux 7753 self-winding chronograph caliber, the ETA Caliber H31 is equipped with a larger mainspring barrel that allowed for a much longer power reserve of whole 60 hours.

The second modification that resulted in better accuracy is a reversed (also known as “glittered”) spiral.

Hamilton ETA Caliber H31 (based on ETA Valjoux 7753 ebauche)

By the way, the same movement powers the new Hamilton Pan Europ Chronograph watch that was presented earlier this year as well as some other fresh offerings from the brand.

As for the price and availability, both are is still to be officially announced.

The only thing that seems to be clear is that this one is not going to be a limited edition: they will produce as many watches as they will be able to sell.

WWR Verdict

Originality 4/5
Build Quality: 5/5
Usability: 4.5/5
Overall Legibility: 4.5/5
Nighttime Legibility: 1/5
Value for Money: n/a

Overall Rating: 4/5

See also: Hamilton Khaki SkyMaster UTC Automatic

Photos: Hamilton

Hamilton Conservation Auto Chronograph automatic wrist watch specification

Price: TBD
Movement: Automatic, ETA Caliber H31, based on ETA Valjoux 7753, Swiss Made
Movement decoration: Branded rotor and chronograph bridge
Functions: Hours, minutes, small seconds, chronograph, date
Power reserve: 60 hours
Case material: Stainless steel
Bezel material: Stainless steel
Crown material: Stainless steel
Case shape: Round
Bezel shape: Round, knurled
Case size: 42.00 mm
Lug width: 21.00 mm
Case height: No data
Dial: Beige
Numerals: Arabic
Hour markers: Luminous
Hands: Luminous
Water resistance: 100 meters
Strap: Brown natural leather strap with rivets and contrast beige stitching
Crystal: Sapphire
Case back: Solid

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