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Casio GBM-2100AvsMomentum M50 Black-Ion

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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.

Casio GBM-2100A

The premium stainless steel bezel and Bluetooth connectivity are highlighted strengths. The increased mass from the metal bezel is noted as a potential drawback for some wearers. Reviewers differ on its value proposition compared to other G-Shock models.

Momentum M50 Black-Ion

The Momentum M50 Black-Ion is praised for its black ion plating, 44mm case size, 10-year battery life, sapphire crystal, 500M water resistance, and outstanding lume. Owners find the case and dial excellent for the price, with the watch being easy to read and suitable for diving. One owner reported the date wheel broke on a white variant, while another found the black-ion NATO strap too short and the 44mm case smaller than expected. Overall, owners rate the Momentum M50 Black-Ion highly for its value and dive-ready features.

At a glance

14 of 29 specs differ
Diameter
GBM-2100A44.4mm
M50 Black-Ion44mm
Power Reserve
GBM-2100A
M50 Black-Ion
Water Resistance
GBM-2100A200m
M50 Black-Ion500m
MSRP
GBM-2100A$280
M50 Black-Ion$443

Full specifications

Case

8 specs
Category
Sport
Diameter
44.4mm
44mm
Thickness
11.9mm
14.5mm
Lug-to-Lug
49.3mm
0mm
Lug Width
22mm
Material
Bio-based Resin / Stainless steel
Stainless Steel
Finish
Water Resistance
200m
500m

Crystal & Dial

3 specs
Crystal
Mineral
Sapphire
AR Coating
No
Dial Color
Silver

Movement

2 specs
Caliber
Miyota 2S60
Power Reserve
0h

Pricing

1 specs
MSRP
$280
$443
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