Side by side

Bremont S502vsSeiko Astron GPS Solar 2025 Limited Edition

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

S502
BremontS502
MSRP $5,100
Astron GPS Solar 2025 Limited Edition
SeikoAstron GPS Solar 2025 Limited Edition
MSRP $2,900

At a glance

14 of 29 specs differ
Diameter
S50243mm
Astron GPS Solar 2025 Limited Edition43.4mm
Power Reserve
S50240h
Astron GPS Solar 2025 Limited Edition40h
Water Resistance
S502500m
Astron GPS Solar 2025 Limited Edition100m
MSRP
S502$5,100
Astron GPS Solar 2025 Limited Edition$2,900

Full specifications

Case

7 specs
Category
Diver
Chronograph
Diameter
43mm
43.4mm
Thickness
16.5mm
13.4mm
Lug-to-Lug
49.5mm
Lug Width
16.5mm
14mm
Material
316L Stainless Steel
Titanium
Water Resistance
500m
100m

Crystal & Dial

3 specs
Crystal Shape
Flat
Curved
AR Coating
Inner
Super-clear coating
Lume
None
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
BE-93-2AE
5X83
Type
Automatic
Quartz
Jewels
25
14

Pricing

1 specs
MSRP
$5,100
$2,900

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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.

Bremont S502

The Bremont S502 is widely praised for its attractive full-stealth, black DLC treatment, and the beige lume that complements its Spec Ops design, with a burnt-orange GMT hand enhancing legibility. Owners find the watch handsome and cool, appreciating the 'black & tan' aesthetic suitable for hard wear. The Bremont S502 features a 502m water-resistance rating and a 42-hour power reserve, powered by a chronometer-rated Bremont BE-93-2AV automatic movement. While many like the NATO strap for its aesthetic and how it ties in with the PVD metalwork, some prefer the original black rubber strap for its comfort and custom fit. On balance, owners and reviewers rate the Bremont S502 highly for its stealthy aesthetic and robust build.

Seiko Astron GPS Solar 2025 Limited Edition

The Seiko Astron GPS Solar 2025 Limited Edition is lauded for its advanced satellite timekeeping and perpetual calendar functionality, offering global time and location updates via GPS signals. Owners appreciate its well-built titanium or steel case, often featuring a ceramic bezel, and the unique asymmetrical design inspired by the 1983 Seiko 7A28 6000. However, its substantial 47mm size and 16.5mm thickness are frequently noted as drawbacks, with some finding it wears large and is difficult to fit under shirt sleeves. The perpetual calendar is limited to displaying only the date, and GPS signal reception requires a clear view of the sky, posing challenges indoors. The watch is priced around $2,900 and is limited to 3,000 pieces. Overall, owners and reviewers value the Seiko Astron GPS Solar 2025 Limited Edition for its cutting-edge technology and distinctive design, despite its considerable dimensions.

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