Side by side

Omega Constellation Co Axial Master ChronometervsGrand Seiko SBGM221

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

What people say

Owners + reviewers, side by side

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

Omega Constellation Co Axial Master Chronometer

Owners widely praise the Omega Constellation Co Axial Master Chronometer as an underrated model and a potential heirloom, appreciating its handsome, well-built design with a silky sun-brushed dial. Some owners express pride in ownership, viewing it as a significant achievement. One reviewer notes the 41mm variant's 50m water resistance and scarcity of lume disqualify it as a sports watch, though it is considered a precision chronometer. Owners desire more strap options, finding the integrated bracelet's notched design limits compatibility with standard straps. Overall, owners and reviewers rate the Omega Constellation Co Axial Master Chronometer highly for its design and build quality, with strap versatility being a minor point of contention.

Grand Seiko SBGM221

Grand Seiko SBGM221 is widely praised for its exceptional dial finish, highly polished hands and indices, and elegant design. Owners consistently highlight the stunning craftsmanship, with specific mention of the up to 11 hand-polished facets on its rectangular markers. The reliable 9S66 movement is noted for its 72-hour power reserve and true GMT functionality, tested beyond Chronometer specifications. Some enthusiasts desire a bidirectional 24-hour bezel, which the Grand Seiko SBGM221 lacks, and its 13.7mm thickness and 19mm lug width are noted as potential limitations. On balance, owners rate the Grand Seiko SBGM221 highly for its exquisite finishing and elegant, comfortable design.

From video reviewers

The SBGM221 is praised for its value within the Grand Seiko lineup. The lug width is cited as a weakness.

At a glance

16 of 29 specs differ
Diameter
Constellation Co Axial Master Chronometer29mm
SBGM22139.5mm
Power Reserve
Constellation Co Axial Master Chronometer50h
SBGM22172h
Water Resistance
Constellation Co Axial Master Chronometer50m
SBGM22130m
MSRP
Constellation Co Axial Master Chronometer$11,200
SBGM221$5,400

Full specifications

Case

8 specs
Category
Dress
GMT
Diameter
29mm
39.5mm
Thickness
12mm
13.7mm
Lug-to-Lug
31.2mm
46.9mm
Lug Width
19mm
Material
Steel & Yellow Gold
Stainless Steel
Finish
Steel
Water Resistance
50m
30m

Crystal & Dial

3 specs
Crystal Shape
Domed
AR Coating
Yes
Dial Color
Silver

Movement

4 specs
Caliber
Omega 8700
Grand Seiko 9S66
Power Reserve
50h
72h
Hacking
Yes
No
Hand-winding
Yes
No

Pricing

1 specs
MSRP
$11,200
$5,400
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