Side by side

Casio GM-2100vsHelgray GMT (Refurbished)

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
GMT (Refurbished)
HelgrayGMT (Refurbished)
MSRP $150
See the full GMT (Refurbished)
Buy from Casio ↗
Buy used on eBay ↗
Buy from Helgray ↗
Buy used on eBay ↗

At a glance

15 of 29 specs differ
Diameter
GM-210044.4mm
GMT (Refurbished)42mm
Power Reserve
GM-2100—
GMT (Refurbished)40h
Water Resistance
GM-2100200m
GMT (Refurbished)50m
MSRP
GM-2100$220
GMT (Refurbished)$150

Full specifications

Case

9 specs
Category
Sport
GMT
Diameter
44.4mm
42mm
Thickness
11.8mm
10.5mm
Lug-to-Lug
49.3mm
46mm
Lug Width
—
20mm
Material
Resin / Stainless steel
Stainless Steel
Finish
—
Brushed and polished
Water Resistance
200m
50m
Caseback
—
Solid

Crystal & Dial

2 specs
Crystal
Mineral
Sapphire
AR Coating
No
Inner

Movement

3 specs
Caliber
—
Swiss-Made Ronda 515.24H Strap
Power Reserve
—
40h
Jewels
0
25

Pricing

1 specs
MSRP
$220
$150
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 · 24 variantsPromaster
44mm·Solar·200m WR
$296MSRP
—Used
Wolbrook Skindiver WT Mecaquartz
Wolbrookmicro

Skindiver WT Mecaquartz

9 watches · 65 variantsSkindiver
40mm·Quartz·150m WR
$348MSRP
—Used
Sternglas Taiga GMT
Sternglasmicro

Taiga GMT

2 variantsTaiga GMT
42mm·Quartz·100m WR
$237MSRP
—Used
Citizen Brycen
Citizen

Brycen

4 watches · 8 variantsBrycen
44.8mm·Solar·100m WR
$319MSRP
—Used
Vaer G2 Pacific GMT
Vaermicro
Pacific

G2 Pacific GMT

3 watches · 6 variantsPacific
39mm·Quartz·150m WR
$399MSRP
—Used
Smith & Bradley Atlantis A2 Quartz
Smith & Bradley

Atlantis A2 Quartz

4 variantsAtlantis A2 Quartz
44mm·Quartz·300m WR
$349MSRP
—Used
Vaer G2 Apocalypse GMT
Vaermicro
Apocalypse

G2 Apocalypse GMT

39mm·Quartz·150m WR
$399MSRP
—Used
Smith & Bradley Atlantis Blackfish Quartz
Smith & Bradley

Atlantis Blackfish Quartz

44mm·Quartz·300m WR
$349MSRP
—Used
All alternatives to the GM-2100 →All alternatives to the GMT (Refurbished) →
Explore the full catalog

Follow this matchup

Get a note when Casio GM-2100 vs Helgray GMT (Refurbished) 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.

Helgray GMT (Refurbished)vsJorg Gray Watches JG8400Filippo Loreti Watches Oscura All Black 45mm LeathervsHelgray GMT (Refurbished)Helgray GMT (Refurbished)vsMomentum Steelix Eclipse Solar 44mmHelgray GMT (Refurbished)vsJorg Gray Watches JG8300Casio GM-2100vsSternglas Taiga GMTCasio GM-2100vsWolbrook Skindiver WT Mecaquartz
Edit this comparisonAdd another watchExplore more 41–46mm watches