Side by side

Sternglas Naos Pro GMT AutomatikvsTissot Le Locle Open Heart

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
Le Locle Open Heart
TissotLe Locle Open Heart
MSRP $995

At a glance

13 of 29 specs differ
Diameter
Naos Pro GMT Automatik38mm
Le Locle Open Heart39.3mm
Power Reserve
Naos Pro GMT Automatik42h
Le Locle Open Heart80h
Water Resistance
Naos Pro GMT Automatik50m
Le Locle Open Heart30m
MSRP
Naos Pro GMT Automatik$863
Le Locle Open Heart$995

Full specifications

Case

6 specs
Category
GMT
Chronograph
Diameter
38mm
39.3mm
Thickness
11mm
9.75mm
Lug-to-Lug
42mm
39.3mm
Lug Width
20mm
19mm
Water Resistance
50m
30m

Crystal & Dial

3 specs
Dial Color
Silver
Indices
Applied
Roman
Lume
Luminova Punkte
None

Movement

3 specs
Caliber
Miyota 9075
11 1/2'''
Power Reserve
42h
80h
Jewels
25

Pricing

1 specs
MSRP
$863
$995

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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.

Tissot Le Locle Open Heart

Owners widely praise the Tissot Le Locle Open Heart for its elegant aesthetic, featuring a guilloché dial and Roman numerals, and appreciate its practical 80-hour power reserve and Nivachron hairspring. The watch is also noted for offering dual bracelet and strap options, along with a see-through case back. However, one owner flags negative community feedback regarding the comfort of the synthetic leather strap. Overall, owners rate the Tissot Le Locle Open Heart highly for its attractive design and impressive technical specifications at its price point.

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