Side by side

Spinnaker Dumas GMTvsSinn U50 HYDRO SDR with TEGIMENT option

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

Dumas GMT
SpinnakerDumas GMT
MSRP $399
U50 HYDRO SDR with TEGIMENT option
SinnU50 HYDRO SDR with TEGIMENT option
MSRP $3,110

At a glance

19 of 29 specs differ
Diameter
Dumas GMT44mm
U50 HYDRO SDR with TEGIMENT option41mm
Power Reserve
Dumas GMT40h
U50 HYDRO SDR with TEGIMENT option40h
Water Resistance
Dumas GMT300m
U50 HYDRO SDR with TEGIMENT option5,000m
MSRP
Dumas GMT$399
U50 HYDRO SDR with TEGIMENT option$3,110

Full specifications

Case

9 specs
Category
GMT
Diver
Diameter
44mm
41mm
Thickness
15mm
11.8mm
Lug-to-Lug
48mm
Lug Width
22mm
20mm
Material
316L Stainless Steel
Stainless Steel
Finish
Brushed and polished
bead-blasted
Water Resistance
300m
5000m
Caseback
Solid

Crystal & Dial

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

Movement

4 specs
Caliber
Seiko NH34A
Ronda 715 Li - SWISS MADE
Type
Automatic
Quartz
Jewels
25
5
Complications
None
Date

Pricing

1 specs
MSRP
$399
$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.

Spinnaker Dumas GMT

Owners praise the Spinnaker Dumas GMT's satisfying lume, including on the crown, and good finishing, with one owner finding it wears well on a 17cm wrist. The watch features a Seiko NH34A GMT movement and a blue gradient dial. Reviewers note its 44mm diameter and 209g weight on the bracelet make it unsuitable for smaller wrists.

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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