Which is cheaper, the Akrone S-05 Bleu Tonnerre or the Casio GMA-S2100?

At MSRP the Casio GMA-S2100 is the cheaper of the two at $110, against $249 for the Akrone S-05 Bleu Tonnerre — a $139 gap before any retailer discounting.

Which is bigger, the Akrone S-05 Bleu Tonnerre or the Casio GMA-S2100?

The Casio GMA-S2100 wears larger at 42.9mm versus 39mm for the Akrone S-05 Bleu Tonnerre — a 3.9mm difference across the dial.

Which has better water resistance, the Akrone S-05 Bleu Tonnerre or the Casio GMA-S2100?

The Akrone S-05 Bleu Tonnerre is rated to 300m versus 200m for the Casio GMA-S2100.

What movement does the Akrone S-05 Bleu Tonnerre run compared to the Casio GMA-S2100?

The Akrone S-05 Bleu Tonnerre runs a mecaquartz caliber (Seiko VK64), while the Casio GMA-S2100 runs a quartz.

Side by side

Akrone S-05 Bleu TonnerrevsCasio GMA-S2100

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

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Akrone S-05 Bleu Tonnerre

MSRP $249

See the full S-05 Bleu Tonnerre

Casio GMA-S2100

GMA-S2100

MSRP $110

See the full GMA-S2100

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At a glance

15 of 29 specs differ

Diameter

S-05 Bleu Tonnerre39mm

GMA-S210042.9mm

Power Reserve

S-05 Bleu Tonnerre—

GMA-S2100—

Water Resistance

S-05 Bleu Tonnerre300m

GMA-S2100200m

MSRP

S-05 Bleu Tonnerre$249

GMA-S2100$110

Full specifications

Case

8 specs

Crystal & Dial

3 specs

Crystal

Sapphire

Mineral

AR Coating

—

Dial Color

—

Black

Movement

3 specs

Caliber

Seiko VK64

—

Type

Mecaquartz

Quartz

Power Reserve

—

Pricing

1 specs

MSRP

$249

$110

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Akrone S-05 Bleu TonnerrevsCasio GMA-S2100

At a glance

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