Side by side

Jack Mason Strat-o-timer GMTvsSeiko Monster

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

Strat-o-timer GMT
Jack MasonStrat-o-timer GMT
MSRP $1,099
Monster
SeikoMonster
MSRP $550
What people say

Owners + reviewers, side by side

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Jack Mason Strat-o-timer GMT

Owners widely praise the Jack Mason Strat-o-timer GMT for its impressive fit and finish, excellent value, and true traveler GMT complication, especially considering its price point. Reviewers and owners alike highlight the comfortable 40mm tonneau case, sapphire crystal bezel, and retro styling. Some owners note the hour markers are "chubby" but do not affect legibility, and the strap ends are slightly large. One owner describes the 7-link bracelet as rivaling luxury brands. On balance, owners and reviewers rate the Jack Mason Strat-o-timer GMT highly for its build quality and value proposition.

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.

At a glance

11 of 29 specs differ
Diameter
Strat-o-timer GMT40mm
Monster42.4mm
Power Reserve
Strat-o-timer GMT42h
Monster41h
Water Resistance
Strat-o-timer GMT200m
Monster200m
MSRP
Strat-o-timer GMT$1,099
Monster$550

Full specifications

Case

4 specs
Category
Diver
Diameter
40mm
42.4mm
Thickness
13.2mm
13.4mm
Lug-to-Lug
47mm
49.4mm

Crystal & Dial

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

Movement

3 specs
Caliber
Miyota 9075
4R36
Power Reserve
42h
41h
Jewels
25
24

Pricing

1 specs
MSRP
$1,099
$550
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