Side by side

Sternglas Naos SolarvsTissot Gentleman Open Heart

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

Naos Solar
SternglasNaos Solar
MSRP $323
Gentleman Open Heart
TissotGentleman Open Heart
MSRP $1,025

At a glance

16 of 29 specs differ
Diameter
Naos Solar38mm
Gentleman Open Heart40mm
Power Reserve
Naos Solar
Gentleman Open Heart80h
Water Resistance
Naos Solar50m
Gentleman Open Heart100m
MSRP
Naos Solar$323
Gentleman Open Heart$1,025

Full specifications

Case

6 specs
Category
Dress
Chronograph
Diameter
38mm
40mm
Thickness
10mm
11.5mm
Lug-to-Lug
42mm
40mm
Lug Width
20mm
21mm
Water Resistance
50m
100m

Crystal & Dial

5 specs
Crystal Shape
Flat
Domed
AR Coating
Inner
Yes
Dial Color
Silver
Indices
Applied
Indexes
Lume
Luminova Punkten
Super-LumiNova ®

Movement

4 specs
Caliber
Seiko VJ76
11 1/2'''
Type
Solar
Automatic
Power Reserve
80h
Jewels
25

Pricing

1 specs
MSRP
$323
$1,025

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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.

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.

Tissot Gentleman Open Heart

Owners widely praise the Tissot Gentleman Open Heart for its versatile dressy-sporty aesthetic and elegant sunburst dial finish, with one owner preferring its less shiny blue dial compared to other versions. The watch offers excellent fit and bracelet adjustability, and its modified Powermatic 80 movement achieves COSC-level accuracy of -3 to +5 seconds/day, though the seconds hand movement is slightly less smooth at 6 movements per second. However, one owner reported the watch arrived non-functional, requiring a return due to an inoperable movement. On balance, owners rate the Tissot Gentleman Open Heart highly for its aesthetic appeal and accurate timekeeping, despite a reported instance of a faulty movement.

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