Side by side

Sternglas Naos SolarvsSeiko Prospex SPEEDTIMER

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

Naos Solar
SternglasNaos Solar
MSRP $323
Prospex SPEEDTIMER
SeikoProspex SPEEDTIMER
MSRP $2,200
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.

Seiko Prospex SPEEDTIMER

Owners widely praise the Seiko Prospex SPEEDTIMER for its unique dial colors and vintage-inspired design, with many appreciating its compact 39mm case size and 100m or 200m water resistance. Reviewers and owners note the V192 solar movement’s power reserve indicator and its reliability, though some owners express a preference for automatic movements. One owner finds the $700 price for a solar quartz model expensive, while another criticizes the €860 price point and desires a thinner case and a bracelet with quick-release or micro-adjustment. On balance, owners and reviewers appreciate the Seiko Prospex SPEEDTIMER for its distinctive aesthetic and versatile wearability, despite some reservations about its price and case thickness.

At a glance

14 of 29 specs differ
Diameter
Naos Solar38mm
Prospex SPEEDTIMER42mm
Power Reserve
Naos Solar
Prospex SPEEDTIMER40h
Water Resistance
Naos Solar50m
Prospex SPEEDTIMER100m
MSRP
Naos Solar$323
Prospex SPEEDTIMER$2,200

Full specifications

Case

5 specs
Category
Dress
Chronograph
Diameter
38mm
42mm
Thickness
10mm
12.9mm
Lug-to-Lug
42mm
49.6mm
Water Resistance
50m
100m

Crystal & Dial

4 specs
Crystal Shape
Flat
Curved
AR Coating
Inner
Super-clear coating
Dial Color
Black
Lume
Luminova Punkten
LumiBrite on hands and index(es)

Movement

4 specs
Caliber
Seiko VJ76
5X83
Type
Solar
Quartz
Power Reserve
40h
Jewels
14

Pricing

1 specs
MSRP
$323
$2,200
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