Side by side

Seiko MonstervsSeiko 5 Sports SKX series

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

Monster
SeikoMonster
MSRP $550
5 Sports SKX series
Seiko5 Sports SKX series
MSRP $495

At a glance

9 of 29 specs differ
Diameter
Monster42.4mm
5 Sports SKX series42.5mm
Power Reserve
Monster41h
5 Sports SKX series41h
Water Resistance
Monster200m
5 Sports SKX series100m
MSRP
Monster$550
5 Sports SKX series$495

Full specifications

Case

6 specs
Category
Diver
GMT
Diameter
42.4mm
42.5mm
Thickness
13.4mm
13.6mm
Lug-to-Lug
49.4mm
46mm
Lug Width
20mm
22mm
Water Resistance
200m
100m

Crystal & Dial

1 specs
Lume
LumiBrite on hands, index(es) and bezel
LumiBrite on hands and index(es)

Movement

1 specs
Caliber
4R36
4R34

Pricing

1 specs
MSRP
$550
$495

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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.

Seiko 5 Sports SKX series

The Seiko 5 Sports SKX series is widely praised as an excellent gateway watch, offering great value with a solid build and powerful lume. Owners widely report that the NH36 movement's accuracy is a "luck of the draw," with official specs allowing up to +/-40 seconds per day, though many experience +/-5 to 10 seconds. Some owners note the lack of a screw-down crown and 100m water resistance, while others highlight its ISO 6425 compliance, 200m water resistance, and screw-down crown as superior tool watch features. Some owners find the original SKX models heavier and bulkier than newer lines, while others praise its iconic, tough, and rugged dive watch design and proven durability. On balance, owners and reviewers rate the Seiko 5 Sports SKX series highly for its iconic, durable dive watch design and strong value proposition.

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