Side by side

Seiko MonstervsYema Navygraf CMM.10

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

Monster
SeikoMonster
MSRP $550
Navygraf CMM.10
YemaNavygraf CMM.10
MSRP $1,899

At a glance

13 of 29 specs differ
Diameter
Monster42.4mm
Navygraf CMM.1039mm
Power Reserve
Monster41h
Navygraf CMM.1040h
Water Resistance
Monster200m
Navygraf CMM.10100m
MSRP
Monster$550
Navygraf CMM.10$1,899

Full specifications

Case

6 specs
Diameter
42.4mm
39mm
Thickness
13.4mm
11mm
Lug-to-Lug
49.4mm
46mm
Lug Width
20mm
19mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
200m
100m

Crystal & Dial

3 specs
Crystal
Hardlex
Domed Sapphire
Dial Color
Black
Standard
Lume
LumiBrite on hands, index(es) and bezel
None

Movement

3 specs
Caliber
4R36
Yema CMM.10
Power Reserve
41h
40h
Jewels
24
25

Pricing

1 specs
MSRP
$550
$1,899

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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 Monster

Owners widely praise the Seiko Prospex Sea for its excellent value, robust build, and superb lume, with many noting its comfortable wearability. Reviewers consistently highlight its impressive finishing and classic dive watch design, often comparing it favorably to older models. Some owners find the size substantial, with one noting it as big, thick, and heavy on a 6.5-inch wrist, while others find it perfect. On balance, owners and reviewers rate the Seiko Prospex Sea highly for its exceptional value and robust, classic dive watch design.

Yema Navygraf CMM.10

Owners widely report quality control concerns and suspect craftsmanship with the Yema Navygraf, with one user noting crooked text. A reviewer praised the Slim CMM.20 Limited Edition for its stylish, slim profile and classy finishing on a black lacquered enamel dial, though the audible micro-rotor spinning at its price point was a surprise. On balance, the consensus is that while the Yema Navygraf offers a stylish design, potential buyers should be aware of reported quality control issues.

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