Side by side

Casio GM-2100vsDecima Gatekeeper

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

Add a watch
GM-2100
CasioGM-2100
MSRP $220
See the full GM-2100
Gatekeeper
DecimaGatekeeper
MSRP $599
See the full Gatekeeper
Buy from Casio ↗
Buy used on eBay ↗
Buy from Decima ↗
Buy used on eBay ↗

At a glance

15 of 29 specs differ
Diameter
GM-210044.4mm
Gatekeeper38mm
Power Reserve
GM-2100—
Gatekeeper42h
Water Resistance
GM-2100200m
Gatekeeper50m
MSRP
GM-2100$220
Gatekeeper$599

Full specifications

Case

8 specs
Category
Sport
—
Diameter
44.4mm
38mm
Thickness
11.8mm
9.9mm
Lug-to-Lug
49.3mm
46mm
Lug Width
—
46mm
Material
Resin / Stainless steel
Stainless Steel
Finish
—
—
Water Resistance
200m
50m

Crystal & Dial

3 specs
Crystal
Mineral
Sapphire
AR Coating
No
Yes
Dial Color
Black
White

Movement

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

Pricing

1 specs
MSRP
$220
$599
Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Citizen Promaster Professional Diver
Citizen
Promaster DiverPromaster

Promaster Professional Diver

9 watches · 18 variantsPromaster
44mm·Solar·200m WR
$296MSRP
—Used
Alexander James Watches A3 Artisan Series
Alexander James Watchesmicro

A3 Artisan Series

2 variantsSeries
38mm·Automatic·100m WR
—MSRP
—Used
Alpharo Watches Model 1
Alpharo Watchesmicro

Model 1

3 variantsSeries
38mm·Automatic
$938MSRP
—Used
Citizen Brycen
Citizen

Brycen

4 watches · 8 variantsBrycen
44.8mm·Solar·100m WR
$319MSRP
—Used
Beaucroft Watches Seeker
Beaucroft Watchesmicro

Seeker

5 variantsSeries
37mm·Automatic
—MSRP
—Used
Smith & Bradley Atlantis Blackfish Quartz
Smith & Bradley

Atlantis Blackfish Quartz

44mm·Quartz·300m WR
$349MSRP
—Used
Mark Time Watches M 6
Mark Time Watchesmicro

M 6

6 variantsSeries
39mm·Automatic·100m WR
$495MSRP
—Used
Smith & Bradley Atlantis A2 Quartz
Smith & Bradley

Atlantis A2 Quartz

4 variantsAtlantis A2 Quartz
44mm·Quartz·300m WR
$349MSRP
—Used
All alternatives to the GM-2100 →All alternatives to the Gatekeeper →
Explore the full catalog

Follow this matchup

Get a note when Casio GM-2100 vs Decima Gatekeeper gets more votes, a community discussion, or a price drop. No account needed.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.

Decima GatekeepervsFilippo Loreti Watches Oscura All Black 45mm LeatherDecima GatekeepervsJorg Gray Watches JG8400Decima GatekeepervsVero Watch Company WorkhorseDecima GatekeepervsElliot Brown CANFORD: 202-004Casio GM-2100vsMonro Adventure Watches LUNA ADVENTURE MLA-PNR POINT OF NO RETURN, 9039 Automatic Watch, 39mm EPDM RubberBeaucroft Watches SeekervsCasio GM-2100
Edit this comparisonAdd another watch