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Seiko Astron GPS Solar 2024 Limited EditionvsYema Superman Slim CMM.20

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

Astron GPS Solar 2024 Limited Edition
SeikoAstron GPS Solar 2024 Limited Edition
MSRP $2,300
Superman Slim CMM.20
YemaSuperman Slim CMM.20
MSRP $2,372
What people say

Owners + reviewers, side by side

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

Seiko Astron GPS Solar 2024 Limited Edition

The Seiko Astron GPS Solar 2024 Limited Edition is widely praised for its light and thin wearability, with owners highlighting its comfortable 39mm size and titanium construction. Reviewers and owners alike commend its excellent lume application, clear and legible dial, and subtle gold accents. The watch offers automatic GPS time adjustment for global time and location updates, a perpetual calendar, and a six-month power reserve, eliminating battery changes. Some owners, however, find its dial too shiny for maximum versatility and note that its size wears larger than its dimensions suggest, making it less of a daily driver for some. A minor point of contention for some is the chapter ring alignment, which was noted as slightly imperfect. Overall, owners and reviewers rate the Seiko Astron GPS Solar 2024 Limited Edition highly for its blend of high-tech functionality, comfortable wearability, and attractive design.

Yema Superman Slim CMM.20

Owners and reviewers praise the Yema Superman Slim CMM.20 for its appealing retro design, balanced 39mm case, and in-house CMM.20 micro-rotor movement, with some finding the fish scale bracelet attractive. Concerns exist regarding its $2500/€2,490 MSRP, with some owners questioning its value and noting the potential for QC issues or a "jittery" seconds hand attributed to the new movement. The bracelet's articulation and stamped clasp draw criticism, though some owners report it improves with wear. Overall, owners and reviewers appreciate the Yema Superman Slim CMM.20's vintage styling and unique micro-rotor movement, but its value proposition and some finishing details are points of contention.

At a glance

14 of 29 specs differ
Diameter
Astron GPS Solar 2024 Limited Edition41.2mm
Superman Slim CMM.2039mm
Power Reserve
Astron GPS Solar 2024 Limited Edition40h
Superman Slim CMM.2040h
Water Resistance
Astron GPS Solar 2024 Limited Edition100m
Superman Slim CMM.20300m
MSRP
Astron GPS Solar 2024 Limited Edition$2,300
Superman Slim CMM.20$2,372

Full specifications

Case

7 specs
Category
GMT
Diver
Diameter
41.2mm
39mm
Thickness
12mm
9.95mm
Lug-to-Lug
48.5mm
Lug Width
14mm
20mm
Material
Titanium
316L Stainless Steel
Water Resistance
100m
300m

Crystal & Dial

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

Movement

3 specs
Caliber
3X62
Yema CMM.20
Type
Quartz
Automatic
Jewels
10
25

Pricing

1 specs
MSRP
$2,300
$2,372
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