Side by side

Casio GBM-2100AvsSpinnaker Hull Diver

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.

Spinnaker Hull Diver

The Spinnaker Hull Diver is widely praised for its excellent build quality, featuring a milled clasp, solid links, and a strong anti-reflective coating on its sapphire crystal. Owners highlight its value, with one calling it one of their best affordable watches at $170, and appreciate the dual-part case construction that contributes to a reduced thickness. The blue dial is noted for its attractive play of light, and the screw-down crown is easy to operate. However, the lume is considered average, and some desire a higher beat movement. On balance, owners rate the Spinnaker Hull Diver highly for its robust construction and strong value proposition at its price point.

From video reviewers

The cushion case design and solid construction are praised. The bracelet is noted as solid stainless steel.

At a glance

15 of 29 specs differ
Diameter
GBM-2100A44.4mm
Hull Diver42mm
Power Reserve
GBM-2100A
Hull Diver
Water Resistance
GBM-2100A200m
Hull Diver300m
MSRP
GBM-2100A$280
Hull Diver$375

Full specifications

Case

8 specs
Category
Sport
Diver
Diameter
44.4mm
42mm
Thickness
11.9mm
15mm
Lug-to-Lug
49.3mm
47.5mm
Lug Width
22mm
Material
Bio-based Resin / Stainless steel
316L Stainless Steel
Finish
Water Resistance
200m
300m

Crystal & Dial

3 specs
Crystal
Mineral
Sapphire
AR Coating
No
Dial Color
Silver
Green

Movement

3 specs
Caliber
Seiko NH35
Type
Quartz
Automatic
Power Reserve
0h

Pricing

1 specs
MSRP
$280
$375
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