Omega Constellation Co Axial Master ChronometervsTissot PRX

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Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Omega Constellation Co Axial Master Chronometer at true scale

Constellation Co Axial Master Chronometer

Tissot PRX at true scale

PRX

Diameter

29mm

40mm

Lug-to-Lug

31.2mm

lowest

39.5mm

Thickness

12mm

10.4mm

lowest

Water Resistance

50m

100m

highest

Power Reserve

50h

n/a

MSRP

$8,500

$450

lowest

Movement

Omega 8700

11.5'

Case

6 specs
Diameter
29mm
40mm
Thickness
12mm
10.4mm
Lug-to-Lug
31.2mm
39.5mm
Lug Width
n/a
12mm
Finish
Steel
n/a
Water Resistance
50m
100m

Crystal & Dial

3 specs
Crystal Shape
Domed
n/a
Indices
n/a
Indexes
Lume
None
Super-LumiNova ®

Movement

5 specs
Caliber
Omega 8700
11.5'
Type
Automatic
Quartz
Power Reserve
50h
0h
Hacking
Yes
No
Hand-winding
Yes
No

Pricing

1 specs
MSRP
$8,500
$450
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Reviews

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Omega Constellation Co Axial Master Chronometer

Owners widely appreciate the Omega Constellation Co Axial Master Chronometer for its clean design and refined, elegant look, with some calling it the most underrated model in Omega's lineup and a personal favorite. Reviewers describe the 29mm Constellation as a handsome, well-built precision chronometer with a silky sun-brushed dial and an elegant monochromatic look. Owners express pride in ownership, viewing it as a potential heirloom. However, some owners note that Omega does not sell alternative straps for the watch. One reviewer considers the 29mm model's 50m water resistance and scarce lume to disqualify it as a sports watch. Owners report that Omega's parts policy for Co-Axial movements can lead to higher servicing costs at official centers. Overall, owners and reviewers highly regard the Omega Constellation Co Axial Master Chronometer for its elegant design and build quality.

Tissot PRX

Owners and reviewers widely praise the Tissot PRX for its excellent case and bracelet finishing, integrated bracelet design, and overall value, with many highlighting its comfortable and wearable 40mm profile. The watch is frequently cited as a strong contender for a first mechanical watch due to its luxurious feel and neo-vintage aesthetic, offering impressive build quality for its price point. Some owners note the bracelet sizing lacks micro-adjustment, and a reviewer found the hands slightly too shiny. On balance, owners and reviewers rate the Tissot PRX highly for its exceptional finishing and integrated bracelet design at an accessible price.

From video reviewers

The Powermatic 80 movement's reliability and 80-hour power reserve are consistently praised. The integrated bracelet's susceptibility to scratches is a noted weakness. Reviewers disagreed on whether the Powermatic 80 movement's accuracy significantly surpasses the quartz version.

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