Side by side

Sternglas Naos Pro GMT AutomatikvsSpinnaker Challenger Automatic

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

Naos Pro GMT Automatik
SternglasNaos Pro GMT Automatik
MSRP $863
Challenger Automatic
SpinnakerChallenger Automatic
MSRP $289

At a glance

13 of 29 specs differ
Diameter
Naos Pro GMT Automatik38mm
Challenger Automatic42mm
Power Reserve
Naos Pro GMT Automatik42h
Challenger Automatic40h
Water Resistance
Naos Pro GMT Automatik50m
Challenger Automatic200m
MSRP
Naos Pro GMT Automatik$863
Challenger Automatic$289

Full specifications

Case

7 specs
Category
GMT
Diver
Diameter
38mm
42mm
Thickness
11mm
19mm
Lug-to-Lug
42mm
49.5mm
Lug Width
20mm
22mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
50m
200m

Crystal & Dial

2 specs
Dial Color
Blue
Lume
Luminova Punkte
None

Movement

3 specs
Caliber
Miyota 9075
SII NH35A
Power Reserve
42h
40h
Jewels
25

Pricing

1 specs
MSRP
$863
$289

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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 Pro GMT Automatik

Owners report the Sternglas Naos can feel underwhelming with a cheap feel and hands resembling office printer output, with some finding it wears smaller than expected and looks like a toy, though others appreciate its understated design. Reviewers highlight the Argo Automatic variant as a compelling sub-€400 mechanical watch with a colorful dial and practical date wheel, suitable for new collectors, featuring a 38mm case and a Miyota 8215 movement. On balance, the consensus is that the Sternglas Naos offers a mixed ownership experience, with its value proposition and entry-level appeal being its strongest points for some.

From video reviewers

The Sternglas Naos Pro GMT Automatik features a clean Bauhaus design that sets it apart from other GMT watches. A notable weakness is the watch's bezel action, which is not as smooth as some reviewers would have liked. Reviewers disagree on the watch's case size, with one reviewer stating it's slightly larger than the original Naos Automatic, while another reviewer doesn't mention this aspect at all.

Spinnaker Challenger Automatic

The Spinnaker Challenger Automatic is widely praised for its fun, playful design, solid build quality, and satisfying bezel action. Owners appreciate the comfortable 42mm DLC-coated case and the thoughtful integration of the Popeye theme, with the character serving as the hour and minute hands. Reviewers note the reliable Seiko NH35 movement and 300m water resistance. Some owners find the blue lume weaker than expected, and the ultra-domed sapphire crystal presents challenges for photography. The thick rubber strap is also cited as difficult to manage. Overall, owners and reviewers rate the Spinnaker Challenger Automatic highly for its unique character integration and solid dive watch fundamentals at its price point.

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