Side by side

RZE Fortitude GMTvsSeiko King Seiko KSK

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

Fortitude GMT
RZEFortitude GMT
MSRP $719
King Seiko KSK
SeikoKing Seiko KSK
MSRP $3,300

At a glance

16 of 29 specs differ
Diameter
Fortitude GMT41mm
King Seiko KSK38.6mm
Power Reserve
Fortitude GMT40h
King Seiko KSK45h
Water Resistance
Fortitude GMT200m
King Seiko KSK50m
MSRP
Fortitude GMT$719
King Seiko KSK$3,300

Full specifications

Case

7 specs
Category
GMT
Dress
Diameter
41mm
38.6mm
Thickness
12mm
10.7mm
Lug-to-Lug
47mm
45.8mm
Lug Width
20mm
19mm
Material
Grade 5 Titanium
Stainless Steel
Water Resistance
200m
50m

Crystal & Dial

4 specs
Crystal Shape
Flat
Box
AR Coating
Underside
Anti-reflective coating on inner surface
Dial Color
Red
Black
Lume
Super-LumiNova BGW9
None

Movement

4 specs
Caliber
Miyota 9075
6L35
Power Reserve
40h
45h
Jewels
25
26
Complications
GMT
None

Pricing

1 specs
MSRP
$719
$3,300

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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.

RZE Fortitude GMT

The RZE Fortitude GMT is widely praised for its lightweight titanium construction and durable UltraHex coating, offering exceptional value under $700. Owners and reviewers highlight its comfortable wearability, with a bracelet featuring a quick-adjust clasp and multiple micro-adjustment positions. The Miyota 9075 flyer GMT movement is noted for its accuracy, with one owner reporting -1 to +1 seconds per day, though another source states a range of -10/+30 seconds per day. The watch's design is appreciated for its soul and attention to detail, including a subtle red crown tube indicator and faceted lugs, and its Nimbus Grey dial features a coarse, sandpaper-like texture and fumé effect. A reviewer points out the rotor can be loud and a smaller screwdriver is needed for sizing, while an owner found the GMT hand lume confusing. Overall, owners and reviewers rate the RZE Fortitude GMT highly for its comfortable titanium build, durable coating, and excellent value.

Seiko King Seiko KSK

Owners and reviewers widely praise the King Seiko KSK for its exceptional dial and case finishing, often compared to higher-end brands, and its slim, retro design. The use of the Calibre 6L35 movement in some variants is seen as a significant upgrade, contributing to a refined feel, while others note the bracelet is unusually nice and the case offers a mix of brushed and polished finishes with sharp angles. However, some owners question the value proposition, citing misaligned screws and clasp components on their examples, and the standard 6R movement in some models is criticized as a disappointment for the price point. Accuracy figures range from +15/-10 seconds per day to +5 to +7 seconds per day, and water resistance is rated at 5 BAR or 50 meters. Overall, owners and reviewers find the King Seiko KSK to be a beautiful and classy watch with fantastic finishing, though some are divided on its value and movement choice at its price point.

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