Side by side

Seiko Prospex SPEEDTIMER MechanicalvsYema Navygraf Chrono

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

Prospex SPEEDTIMER Mechanical
SeikoProspex SPEEDTIMER Mechanical
MSRP $995
Navygraf Chrono
YemaNavygraf Chrono
MSRP $1,999

At a glance

14 of 29 specs differ
Diameter
Prospex SPEEDTIMER Mechanical39.5mm
Navygraf Chrono40mm
Power Reserve
Prospex SPEEDTIMER Mechanical72h
Navygraf Chrono40h
Water Resistance
Prospex SPEEDTIMER Mechanical200m
Navygraf Chrono100m
MSRP
Prospex SPEEDTIMER Mechanical$995
Navygraf Chrono$1,999

Full specifications

Case

5 specs
Diameter
39.5mm
40mm
Thickness
12mm
13.9mm
Lug-to-Lug
44.5mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
200m
100m

Crystal & Dial

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

Movement

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

Pricing

1 specs
MSRP
$995
$1,999

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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.

Yema Navygraf Chrono

Owners praise the Yema Navygraf Chrono for its handsome, versatile design and the value offered by its Valjoux 7750 movement. A reviewer notes the 40mm case's fully polished finish, which some feel clashes with its sporty aesthetic, and mentions its 13.9mm thickness is noticeable. One owner reported wearing the Yema Navygraf Chrono for two months without issues, receiving compliments. On balance, owners and reviewers find the Yema Navygraf Chrono to be a good-looking and well-specced watch for its price.

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