Side by side

Formex Essence ThirtyNinevsSternglas Naos Solar

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.

Sternglas Naos Solar

Owners widely praise the Sternglas Naos Solar for its elegant Bauhaus-inspired minimalist dial, slim profile, and value for money. The scratch-resistant curved sapphire crystal and functional date mechanism are noted as durable features, with one owner reporting good wear over a year. The solar power and accuracy are highlighted as practical advantages over automatic movements, which some find loud. However, opinions are split, with some owners finding the watch underwhelming and cheap-looking, like a toy, while others love its appearance in person and its clean, appealing design as a smartwatch alternative. The stock leather strap is described as decent but basic and potentially short for larger wrists, with one owner advising a third-party replacement for durability. One owner of a different variant noted the date font is too small to be useful.

At a glance

10 of 29 specs differ
Diameter
Essence ThirtyNine39mm
Naos Solar38mm
Power Reserve
Essence ThirtyNine41h
Naos Solar
Water Resistance
Essence ThirtyNine100m
Naos Solar50m
MSRP
Essence ThirtyNine$2,390
Naos Solar$323

Full specifications

Case

3 specs
Diameter
39mm
38mm
Lug-to-Lug
45mm
42mm
Water Resistance
100m
50m

Crystal & Dial

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

Movement

4 specs
Caliber
Sellita SW200-1
Seiko VJ76
Type
Automatic
Solar
Power Reserve
41h
Jewels
0

Pricing

1 specs
MSRP
$2,390
$323
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