Side by side

Omega Speedmaster Moonphase Co Axial Master Chronometer Moonphase Chronograph 44 25mmvsSeiko Prospex SPEEDTIMER

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 Speedmaster Moonphase Co Axial Master Chronometer Moonphase Chronograph 44 25mm

Owners widely praise the Omega Speedmaster Moonphase Co Axial Master Chronometer Moonphase Chronograph 44 25mm for its stunning, photorealistic moonphase complication, often noting its detailed imagery and hidden astronaut footprint. The watch's unique Speedmaster design, ceramic bezel with Liquidmetal, and striking dial colors are also frequently highlighted. However, reviewers and owners consistently flag its significant thickness, with measurements around 16.85mm to 17mm, making it challenging to wear under cuffs and leading some to describe it as a "beast" or "chunky." Some owners also find the 44.25mm case size bold or gaudy, suggesting it works best for larger wrists. On balance, owners and reviewers appreciate the Omega Speedmaster Moonphase Co Axial Master Chronometer Moonphase Chronograph 44 25mm for its technically superior movement and exceptional moonphase display, despite its substantial dimensions.

Seiko Prospex SPEEDTIMER

Owners widely praise the Seiko Prospex SPEEDTIMER's design, with specific mentions of its beautiful ice blue sundial and compact 39mm case size, which some note wears smaller than its specifications due to a short lug-to-lug distance. Reviewers highlight its racing-inspired aesthetic and versatility, with one owner finding the 39mm solar model a sturdy and reliable everyday watch with 100m water resistance. However, some owners question the value proposition, citing the $700 price for a solar quartz model and a thickness of 13mm, while others expressed a preference for automatic movements. On balance, owners and reviewers appreciate the Seiko Prospex SPEEDTIMER's attractive vintage-inspired design and compact wearability, though some debate its value and thickness for a solar quartz chronograph.

At a glance

17 of 29 specs differ
Diameter
Speedmaster Moonphase Co Axial Master Chronometer Moonphase Chronograph 44 25mm44.25mm
Prospex SPEEDTIMER41.4mm
Power Reserve
Speedmaster Moonphase Co Axial Master Chronometer Moonphase Chronograph 44 25mm60h
Prospex SPEEDTIMER40h
Water Resistance
Speedmaster Moonphase Co Axial Master Chronometer Moonphase Chronograph 44 25mm100m
Prospex SPEEDTIMER100m
MSRP
Speedmaster Moonphase Co Axial Master Chronometer Moonphase Chronograph 44 25mm$18,100
Prospex SPEEDTIMER$750

Full specifications

Case

6 specs
Diameter
44.25mm
41.4mm
Thickness
16.85mm
13mm
Lug-to-Lug
50mm
45.9mm
Material
Steel & Yellow Gold
Stainless Steel
Finish
Steel
Brushed and polished
Caseback
Solid

Crystal & Dial

4 specs
Crystal Shape
Domed
Curved
AR Coating
Anti-reflective coating on inner surface
Indices
Applied
Lume
None
LumiBrite on hands and index(es)

Movement

6 specs
Caliber
Omega 9904
V192
Type
Automatic
Quartz
Beat Rate
0 vph
28,800 vph
Power Reserve
60h
40h
Jewels
0
25
Complications
Chronograph, Moonphase
None

Pricing

1 specs
MSRP
$18,100
$750
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