Side by side

Formex Essence ThirtyNinevsHamilton Khaki Aviation Pilot Day-Date - Air Zermatt Auto

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Formex Essence ThirtyNine

The Formex Essence ThirtyNine is praised for its impressive build quality and value, featuring a patented case suspension system for comfort and protection. It houses a COSC-certified Sellita SW200-1 movement with a 38-hour power reserve and a tool-free strap quick-release system. A minor inconvenience noted is the specific closing order of the clasp. On balance, reviewers rate the Formex Essence ThirtyNine highly for its comfortable wearability and excellent value at its price point.

From video reviewers

The case suspension system enhances comfort and the COSC-certified movement is a strong feature. The bracelet exhibits noticeable rattle. Reviewers disagreed on the ideal case size, with some preferring the 39mm and others the 41mm.

Hamilton Khaki Aviation Pilot Day-Date - Air Zermatt Auto

The Hamilton Khaki Aviation Pilot Day-Date - Air Zermatt Auto is widely praised for its value, with reviewers noting the Swatch Group's economies of scale contribute to its affordability. Owners and reviewers highlight the large, easy-to-read dial, with one source specifically mentioning the "ice-cold" blue degradé sub-dials as an unusual chromatic anomaly for its price point, and another noting the painted, luminous indices as a significant advantage. The 42mm case is described as offering a nice mix of brushed and polished finishes, and the slightly domed sapphire crystal enhances readability. The H-21 caliber provides a 60-hour power reserve and an anti-magnetic silicon balance spring, while the ETA 2834-2 movement offers precise day/date changes, though one source notes its 40-hour power reserve requires weekly winding. Some criticism is directed at the use of three different fonts and inconsistent color matching for the day/date indicators.

At a glance

9 of 29 specs differ
Diameter
Essence ThirtyNine39mm
Khaki Aviation Pilot Day-Date - Air Zermatt Auto42mm
Power Reserve
Essence ThirtyNine41h
Khaki Aviation Pilot Day-Date - Air Zermatt Auto80h
Water Resistance
Essence ThirtyNine100m
Khaki Aviation Pilot Day-Date - Air Zermatt Auto100m
MSRP
Essence ThirtyNine$2,390
Khaki Aviation Pilot Day-Date - Air Zermatt Auto$1,075

Full specifications

Case

4 specs
Category
Dress
Pilot
Diameter
39mm
42mm
Thickness
10mm
12.15mm
Lug-to-Lug
45mm
46mm

Crystal & Dial

2 specs
Dial Color
Space Ghost
Black
Lume
Super-LumiNova
None

Movement

2 specs
Caliber
Sellita SW200-1
H-40 (ETA 2834-2 base)
Power Reserve
41h
80h

Pricing

1 specs
MSRP
$2,390
$1,075
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