Side by side

Seiko Prospex SPEEDTIMER MechanicalvsZelos Helmsman 3

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

Prospex SPEEDTIMER Mechanical
SeikoProspex SPEEDTIMER Mechanical
MSRP $995
Helmsman 3
ZelosHelmsman 3
MSRP $529

At a glance

14 of 29 specs differ
Diameter
Prospex SPEEDTIMER Mechanical39.5mm
Helmsman 340mm
Power Reserve
Prospex SPEEDTIMER Mechanical72h
Helmsman 340h
Water Resistance
Prospex SPEEDTIMER Mechanical200m
Helmsman 3200m
MSRP
Prospex SPEEDTIMER Mechanical$995
Helmsman 3$529

Full specifications

Case

5 specs
Category
Chronograph
Diver
Diameter
39.5mm
40mm
Thickness
12mm
11.5mm
Lug-to-Lug
44.5mm
40mm
Material
Stainless Steel
316L Stainless Steel

Crystal & Dial

5 specs
Crystal
Sapphire
Domed Sapphire
Crystal Shape
Curved
Flat
AR Coating
Anti-reflective coating on inner surface
Inner
Dial Color
Black
SS - Frost
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
$529

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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 Helmsman 3

Owners widely praise the Zelos Helmsman 3 for its exceptional finishing and polishing on the titanium case, with some noting it feels nicer than previous models. The unique Titanium Crystalline Dial and Damascus Titanium dial are frequently highlighted as aesthetically pleasing and head-turning features, especially considering the price point. The brushed beads of rice bracelet is described as fitting well, and the on-the-fly clasp is considered amazing. Lume is also noted as great, with lumed crowns being a positive observation. However, some owners report the watch can feel top-heavy with sharp edges, making it uncertain as a daily driver for some. The meteorite bezel is seen by one owner as not adding significant value, and the stock strap's keepers and stitching were considered to detract from the watch's appearance.

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