Side by side

Omega Speedmaster 38 Co Axial Chronometer Chronograph 38mmvsSeiko Prospex SPEEDTIMER Seiko 145th Anniversary Limited Edition

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 38 Co Axial Chronometer Chronograph 38mm

Owners widely praise the Omega Speedmaster 38 Co Axial Chronometer Chronograph 38mm for its refined 38mm sizing, which offers a perfect fit on smaller wrists, and its excellent chronometer accuracy, averaging around -1 second per day. The sunburst dial is considered excellent, though some find the watch appears "blingier" in person than in photos. A drawback noted by one owner is the pin-operated date change mechanism, which prevents adjustments while the watch is in use, and the lack of a screw-down crown. On balance, owners rate the Omega Speedmaster 38 Co Axial Chronometer Chronograph 38mm highly for its comfortable wearability and updated design on smaller wrists.

Seiko Prospex SPEEDTIMER Seiko 145th Anniversary Limited Edition

Owners widely praise the Prospex SPEEDTIMER Seiko 145th Anniversary Limited Edition for its refined presence and intricate dial patterns, with some favoring its unique red dial and steel bezel over other Speedtimer models. However, some owners criticize the 24-hour subdial as useless, the date window as recessed, and the stock bracelet as difficult to fit, while others find the pushers stick out too much. One owner notes the $995 price point is high for the 6R55 movement, suggesting a lower range, though others appreciate the Seiko finishing and charm. On balance, owners rate the Prospex SPEEDTIMER Seiko 145th Anniversary Limited Edition well for its unique aesthetic and finishing, despite some functional and value concerns.

At a glance

18 of 29 specs differ
Diameter
Speedmaster 38 Co Axial Chronometer Chronograph 38mm38mm
Prospex SPEEDTIMER Seiko 145th Anniversary Limited Edition42mm
Power Reserve
Speedmaster 38 Co Axial Chronometer Chronograph 38mm52h
Prospex SPEEDTIMER Seiko 145th Anniversary Limited Edition45h
Water Resistance
Speedmaster 38 Co Axial Chronometer Chronograph 38mm100m
Prospex SPEEDTIMER Seiko 145th Anniversary Limited Edition100m
MSRP
Speedmaster 38 Co Axial Chronometer Chronograph 38mm$8,700
Prospex SPEEDTIMER Seiko 145th Anniversary Limited Edition$2,500

Full specifications

Case

7 specs
Diameter
38mm
42mm
Thickness
14.7mm
14.6mm
Lug-to-Lug
44.9mm
49.5mm
Lug Width
18mm
20mm
Material
Steel & Yellow Gold
Stainless Steel
Finish
Steel
Brushed and polished
Caseback
Solid

Crystal & Dial

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

Movement

5 specs
Caliber
Omega 3330
8R48
Beat Rate
0 vph
28,800 vph
Power Reserve
52h
45h
Jewels
0
34
Complications
Chronograph
None

Pricing

1 specs
MSRP
$8,700
$2,500
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