Side by side

Seiko Prospex SPEEDTIMER MechanicalvsZelos Great White 43

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

Prospex SPEEDTIMER Mechanical
SeikoProspex SPEEDTIMER Mechanical
MSRP $995
Great White 43
ZelosGreat White 43
MSRP $599

At a glance

14 of 29 specs differ
Diameter
Prospex SPEEDTIMER Mechanical39.5mm
Great White 4343mm
Power Reserve
Prospex SPEEDTIMER Mechanical72h
Great White 4340h
Water Resistance
Prospex SPEEDTIMER Mechanical200m
Great White 43300m
MSRP
Prospex SPEEDTIMER Mechanical$995
Great White 43$599

Full specifications

Case

6 specs
Category
Chronograph
Diver
Diameter
39.5mm
43mm
Lug-to-Lug
44.5mm
43mm
Lug Width
20mm
22mm
Material
Stainless Steel
Titanium (DLC coated)
Water Resistance
200m
300m

Crystal & Dial

4 specs
Crystal Shape
Curved
Flat
AR Coating
Anti-reflective coating on inner surface
Inner
Dial Color
Black
Blue
Lume
LumiBrite on hands and index(es)
None

Movement

3 specs
Caliber
6R55
Miyota 9015
Power Reserve
72h
40h
Jewels
24
25

Pricing

1 specs
MSRP
$995
$599

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What people say

Owners + reviewers, side by side

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

Seiko Prospex SPEEDTIMER Mechanical

The Seiko Prospex SPEEDTIMER Mechanical is praised for its visually appealing design and comfortable wearability, with owners frequently using its chronograph function for daily tasks. Reviewers note its clean dial layout and LumiBrite treated hands and markers, and one source highlights the 72-hour power reserve of the 6R55 movement. However, some owners criticize its chronograph functionality and the 24-hour subdial. On balance, owners and reviewers rate the Seiko Prospex SPEEDTIMER Mechanical highly for its daily usability and refined aesthetics.

Zelos Great White 43

Owners widely praise the Zelos Great White 43's "unbelievable" and "amazing" lume, particularly on the carbon and Frost variants. The Miyota 9015 movement and 300m water resistance are noted features. Some owners find the 43mm size large, while others report it wears well. Opinions are divided on colorways, with some disappointed by the absence of a "Nebula" option and others finding the "Arctic" version striking. Overall, owners rate the Zelos Great White 43 highly for its exceptional lume and robust specifications at the price point.

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