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Casio GBM-2100AvsFerro & Company TIME MASTER 70 BLUE /

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

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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.

Ferro & Company TIME MASTER 70 BLUE /

Owners widely praise the Ferro & Company TIME MASTER 70 BLUE / for its comfortable 39mm size and excellent wearability, with reviewers highlighting its distinctive TV dial and retro case shape. The bracelet is frequently commended for its on-the-fly micro-adjust clasp and comfortable fit, and build quality is noted as a strong point. The Miyota 9039 movement is described as solid and smooth-winding, featuring hacking seconds. Some owners find the design potentially too retro, while others appreciate its unique aesthetic and elevated secondhand. On balance, owners and reviewers rate the Ferro & Company TIME MASTER 70 BLUE / highly for its comfortable dimensions and well-executed vintage design at its price point.

At a glance

15 of 29 specs differ
Diameter
GBM-2100A44.4mm
TIME MASTER 70 BLUE /39mm
Power Reserve
GBM-2100A
TIME MASTER 70 BLUE /42h
Water Resistance
GBM-2100A200m
TIME MASTER 70 BLUE /100m
MSRP
GBM-2100A$280
TIME MASTER 70 BLUE /$685

Full specifications

Case

8 specs
Category
Sport
Diameter
44.4mm
39mm
Thickness
11.9mm
11mm
Lug-to-Lug
49.3mm
47mm
Lug Width
20mm
Material
Bio-based Resin / Stainless steel
Stainless Steel
Finish
Water Resistance
200m
100m

Crystal & Dial

3 specs
Crystal
Mineral
Sapphire
AR Coating
No
Dial Color
Silver

Movement

3 specs
Caliber
Miyota 9039
Type
Quartz
Automatic
Power Reserve
42h

Pricing

1 specs
MSRP
$280
$685
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