Side by side

Sternglas NaosvsSinn U50 HYDRO SDR with TEGIMENT option

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

Naos
SternglasNaos
MSRP $323
U50 HYDRO SDR with TEGIMENT option
SinnU50 HYDRO SDR with TEGIMENT option
MSRP $3,110

At a glance

17 of 29 specs differ
Diameter
Naos38mm
U50 HYDRO SDR with TEGIMENT option41mm
Power Reserve
Naos
U50 HYDRO SDR with TEGIMENT option40h
Water Resistance
Naos50m
U50 HYDRO SDR with TEGIMENT option5,000m
MSRP
Naos$323
U50 HYDRO SDR with TEGIMENT option$3,110

Full specifications

Case

7 specs
Category
Dress
Diver
Diameter
38mm
41mm
Thickness
7.2mm
11.8mm
Lug-to-Lug
41mm
Finish
Brushed and polished
bead-blasted
Water Resistance
50m
5000m
Caseback
Solid

Crystal & Dial

5 specs
Crystal Shape
Flat
AR Coating
Inner
Underside
Dial Color
Black
Indices
Applied
Lume
None
Luminescent

Movement

4 specs
Caliber
Ronda 714
Ronda 715 Li - SWISS MADE
Power Reserve
40h
Jewels
5
Complications
None
Date

Pricing

1 specs
MSRP
$323
$3,110

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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

The Sternglas Naos is widely praised for its refined daily wearability and Bauhaus design, with owners noting its durable construction, scratchless sapphire crystal, and flawless date mechanism. Reviewers highlight the comfortable and supple bracelet that drapes well and a date window that matches the dial. One owner advises replacing the original tan strap due to a lack of durability. The quartz movement is noted for its accuracy, and the absence of a seconds hand is seen as a unique solution to prevent misaligned markers. Overall, owners and reviewers rate the Sternglas Naos highly for its harmonious design and comfortable wear at its price point.

Sinn U50 HYDRO SDR with TEGIMENT option

The Sinn U50 HYDRO SDR with TEGIMENT option is widely praised for its exceptional scratch resistance and legibility, with owners reporting no signs of wear after extended use. The oil-filled case contributes to extreme water resistance and a clear dial, while the fully tegimented construction offers a soft feel on the wrist. Reviewers note the compact 41mm size, though one owner found it did not wear as thin as expected due to its thickness. The lume is considered underwhelming by some, and the diving extension on the clasp can release too easily. It utilizes a quartz movement, which is noted as less accurate than previous thermo-compensated options. Overall, owners and reviewers rate the Sinn U50 HYDRO SDR with TEGIMENT option highly for its robust, legible, and virtually indestructible build at its price point.

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