Side by side

Seiko MonstervsYema Diver

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

Monster
SeikoMonster
MSRP $550
Diver
YemaDiver
MSRP $990

At a glance

10 of 29 specs differ
Diameter
Monster42.4mm
Diver39.5mm
Power Reserve
Monster41h
Diver40h
Water Resistance
Monster200m
Diver200m
MSRP
Monster$550
Diver$990

Full specifications

Case

4 specs
Diameter
42.4mm
39.5mm
Thickness
13.4mm
10.95mm
Lug-to-Lug
49.4mm
Material
Stainless Steel
316L Stainless Steel

Crystal & Dial

2 specs
Crystal
Hardlex
Sapphire
Lume
LumiBrite on hands, index(es) and bezel
None

Movement

3 specs
Caliber
4R36
Sellita SW200
Power Reserve
41h
40h
Jewels
24
25

Pricing

1 specs
MSRP
$550
$990

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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 Diver

One owner reported a water ingress issue on their Yema Diver the first time it got wet in a lake, despite rinsing and inspecting the watch and bezel. Another owner notes this manual wind Yema Diver has a cool patina but is unlikely to be waterproof or gain value. Overall, owners view the Yema Diver as a fun second watch rather than an investment.

From video reviewers

The Swiss Sellita movement is a notable feature. Reviewers did not reach a consensus on any weaknesses.

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