Side by side

Sternglas Naos Pro GMT AutomatikvsFormex Reef GMT

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
Reef GMT
FormexReef GMT
MSRP $2,235

At a glance

11 of 29 specs differ
Diameter
Naos Pro GMT Automatik38mm
Reef GMT42mm
Power Reserve
Naos Pro GMT Automatik42h
Reef GMT56h
Water Resistance
Naos Pro GMT Automatik50m
Reef GMT300m
MSRP
Naos Pro GMT Automatik$863
Reef GMT$2,235

Full specifications

Case

5 specs
Diameter
38mm
42mm
Thickness
11mm
11.4mm
Lug-to-Lug
42mm
47mm
Lug Width
20mm
22mm
Water Resistance
50m
300m

Crystal & Dial

2 specs
Dial Color
Black
Lume
Luminova Punkte
Super-LumiNova

Movement

3 specs
Caliber
Miyota 9075
Sellita SW330-2
Power Reserve
42h
56h
Jewels
25

Pricing

1 specs
MSRP
$863
$2,235

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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.

Formex Reef GMT

The Formex Reef GMT is widely praised for its unique porthole case shape, COSC-certified Sellita SW330-2 movement with good finishing, and comfortable quick-release bracelet with on-the-fly micro-adjustment. Reviewers note its robust construction, impressive specifications, and strong value proposition, with a slim 11.4mm profile accommodating 300m water resistance and an exhibition caseback. However, owners widely report the 53mm lug-to-lug span with male endlinks makes it too large for smaller wrists. Some find the bezel action stiff and potentially slippery, and a reviewer desired sharper finishing and edges, deeming the aesthetic too modernist. The GMT variant sacrifices a timing bezel unless swapped, and one owner notes sharp edges on the crown and crown guard. Overall, owners and reviewers highly rate the Formex Reef GMT for its exceptional value and well-executed features, particularly its bracelet system and COSC-certified movement.

From video reviewers

The watch features a COSC-certified SW330-2 GMT movement, which is visible through a sapphire crystal display case back and beautifully decorated. The watch's water-resistance of up to 300m/1000ft is a notable feature. The 42mm diameter may be too large for smaller wrists.

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