Which is cheaper, the Casio GBM-2100A or the Casio Black?

At MSRP the Casio Black is the cheaper of the two at $145, against $280 for the Casio GBM-2100A — a $135 gap before any retailer discounting.

Which is bigger, the Casio GBM-2100A or the Casio Black?

The Casio GBM-2100A wears larger at 44.4mm versus 43.2mm for the Casio Black — a 1.2mm difference across the dial.

What movement does the Casio GBM-2100A run compared to the Casio Black?

The Casio GBM-2100A runs a quartz caliber, while the Casio Black runs a solar.

Side by side

Casio GBM-2100AvsCasio Black

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

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Casio GBM-2100A

GBM-2100A

MSRP $280

See the full GBM-2100A

Casio Black

GW-M5610-1JF

MSRP $145

At a glance

12 of 29 specs differ

Diameter

GBM-2100A44.4mm

Black43.2mm

Power Reserve

GBM-2100A—

Black—

Water Resistance

GBM-2100A200m

Black200m

MSRP

GBM-2100A$280

Black$145

Full specifications

Case

6 specs

Diameter

44.4mm

43.2mm

Thickness

11.9mm

12.7mm

Lug-to-Lug

49.3mm

46.7mm

Lug Width

—

0mm

Material

Bio-based Resin / Stainless steel

Resin

Finish

—

Crystal & Dial

2 specs

AR Coating

—

Dial Color

Silver

Black

Movement

3 specs

Caliber

—

Type

Quartz

Solar

Complications

None

alarm, chronograph, radio-sync

Pricing

1 specs

MSRP

$280

$145

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Casio GBM-2100AvsCasio Black

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