Side by side

Formex Essence ThirtyNinevsSternglas Naos Pro GMT Automatik

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

Essence ThirtyNine
FormexEssence ThirtyNine
MSRP $2,390
Naos Pro GMT Automatik
SternglasNaos Pro GMT Automatik
MSRP $863

At a glance

11 of 29 specs differ
Diameter
Essence ThirtyNine39mm
Naos Pro GMT Automatik38mm
Power Reserve
Essence ThirtyNine41h
Naos Pro GMT Automatik42h
Water Resistance
Essence ThirtyNine100m
Naos Pro GMT Automatik50m
MSRP
Essence ThirtyNine$2,390
Naos Pro GMT Automatik$863

Full specifications

Case

5 specs
Category
Dress
GMT
Diameter
39mm
38mm
Thickness
10mm
11mm
Lug-to-Lug
45mm
42mm
Water Resistance
100m
50m

Crystal & Dial

2 specs
Dial Color
Space Ghost
Lume
Super-LumiNova
Luminova Punkte

Movement

3 specs
Caliber
Sellita SW200-1
Miyota 9075
Power Reserve
41h
42h
Jewels
25

Pricing

1 specs
MSRP
$2,390
$863

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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.

Sternglas Naos Pro GMT Automatik

Owners report the Sternglas Naos can feel underwhelming with a cheap feel and hands resembling office printer output, with some finding it wears smaller than expected and looks like a toy, though others appreciate its understated design. Reviewers highlight the Argo Automatic variant as a compelling sub-€400 mechanical watch with a colorful dial and practical date wheel, suitable for new collectors, featuring a 38mm case and a Miyota 8215 movement. On balance, the consensus is that the Sternglas Naos offers a mixed ownership experience, with its value proposition and entry-level appeal being its strongest points for some.

From video reviewers

The Sternglas Naos Pro GMT Automatik features a clean Bauhaus design that sets it apart from other GMT watches. A notable weakness is the watch's bezel action, which is not as smooth as some reviewers would have liked. Reviewers disagree on the watch's case size, with one reviewer stating it's slightly larger than the original Naos Automatic, while another reviewer doesn't mention this aspect at all.

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