Side by side

Seiko Prospex SPEEDTIMER MechanicalvsYema Navygraf Pearl CMM.20

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 Pearl CMM.20
YemaNavygraf Pearl CMM.20
MSRP $1,862

At a glance

16 of 29 specs differ
Diameter
Prospex SPEEDTIMER Mechanical39.5mm
Navygraf Pearl CMM.2039mm
Power Reserve
Prospex SPEEDTIMER Mechanical72h
Navygraf Pearl CMM.2040h
Water Resistance
Prospex SPEEDTIMER Mechanical200m
Navygraf Pearl CMM.20100m
MSRP
Prospex SPEEDTIMER Mechanical$995
Navygraf Pearl CMM.20$1,862

Full specifications

Case

7 specs
Category
Chronograph
Diver
Diameter
39.5mm
39mm
Thickness
12mm
9.75mm
Lug-to-Lug
44.5mm
46mm
Lug Width
20mm
19mm
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
Pearl
Lume
LumiBrite on hands and index(es)
None

Movement

3 specs
Caliber
6R55
Yema CMM.20
Power Reserve
72h
40h
Jewels
24
25

Pricing

1 specs
MSRP
$995
$1,862

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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 Pearl CMM.20

The Yema Navygraf Pearl CMM.20 is praised for its elegant and slim case design, measuring between 9.5mm and 9.75mm thick, and its unique mother-of-pearl dial and bezel. The watch features functional dive watch elements like 200-meter water resistance and is powered by the in-house CMM.20 micro-rotor movement, which offers a 70-hour power reserve and is adjusted to -3/+7 seconds a day. Overall, reviewers highlight the Yema Navygraf Pearl CMM.20's sophisticated aesthetic and slim profile as its primary strengths.

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