Omega Speedmaster X 33 Marstimer Chronograph 45mmvsSeiko Prospex Speedtimer

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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 Speedmaster X 33 Marstimer Chronograph 45mm at true scale

Speedmaster X 33 Marstimer Chronograph 45mm

Seiko Prospex Speedtimer at true scale

Prospex Speedtimer

Diameter

45mm

42mm

Lug-to-Lug

48.5mm

lowest

49.6mm

Thickness

14.9mm

12.9mm

lowest

Water Resistance

30m

100m

highest

MSRP

$7,000

$2,200

lowest

Movement

Omega 5622

Seiko 5X83

Case

6 specs
Diameter
45mm
42mm
Thickness
14.89mm
12.9mm
Lug-to-Lug
48.5mm
49.6mm
Material
Titanium
Stainless Steel
Finish
Titanium
n/a
Water Resistance
30m
100m

Crystal & Dial

4 specs
Crystal Shape
Domed
Curved
AR Coating
n/a
Super-clear coating
Dial Color
Black
n/a
Lume
None
LumiBrite on hands and index(es)

Movement

5 specs
Caliber
Omega 5622
Seiko 5X83
Jewels
0
14
Hacking
Yes
No
Hand-winding
Yes
No
Complications
Chronograph
None

Pricing

1 specs
MSRP
$7,000
$2,200
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Reviews

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

Omega Speedmaster X 33 Marstimer Chronograph 45mm

Owners widely praise the Omega Speedmaster X 33 Marstimer Chronograph 45mm for its surprisingly light titanium case, legible analog display, and the near-imperceptible second-hand tick. The unique Mars timekeeping functionality and instrument-like aesthetic are also noted as compelling aspects. However, the watch proves divisive, with some owners criticizing its 30m water resistance and aluminum bezel, and others finding the 45mm case too large. The price premium for a quartz movement and the perceived niche appeal of its Mars-specific features are also points of contention. Overall, owners and reviewers find the Omega Speedmaster X 33 Marstimer Chronograph 45mm a cool, instrument-like watch with unique functionality, though its size and quartz movement are debated.

Seiko Prospex Speedtimer

Owners praise the Seiko Prospex SPEEDTIMER's unique dial colors, with one highlighting a red dial and another a cream and purple-gray panda. Some owners find the 39mm variants sturdy, reliable, and versatile for everyday wear. A few owners express a preference for automatic movements over the quartz caliber. One reviewer notes a price of €860/£730 for a Speedtimer variant. On balance, owners appreciate the Seiko Prospex SPEEDTIMER's distinctive design and everyday wearability, though some find the quartz movement and price points to be drawbacks.

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