Casio G-Shock GMA-S2100 (small) vs Orient Mako II

Side-by-side comparison of specifications and features

CasioG-Shock

GMA-S2100 (small)

OrientMako II

FAA02001B9

Key Differences

Best Value

Casio G-Shock (Ref. GMA-S2100 (small))

Starting from $129

Slimmest

Casio G-Shock (Ref. GMA-S2100 (small))

11.2mm thick

See Both Watches on Your Wrist

Set your wrist circumference to compare relative case presence. Lug-to-lug is included when the catalog has it.

Your wrist

Medium (6.7″)

Watch A

Casio G-Shock GMA-S2100 (small)

Balanced

Round · 42.9mm · 46.2mm lug-to-lug

Optimal proportions for most wrists

Case: 42.9mmLug-to-lug: 46.2mmThickness: 11.2mm

Open this size in the full fit chart →

Watch B

Orient Mako II

Balanced

Round · 41.5mm · 47mm lug-to-lug

Optimal proportions for most wrists

Case: 41.5mmLug-to-lug: 47mmThickness: 13mm

Open this size in the full fit chart →

Proportional guide only: wrist shape, strap articulation, bezel design, and case curvature change how a watch actually wears.

Price Comparison

Casio G-Shock

MSRP

$150

New

$129

Used

$105

Orient Mako II

MSRP

$230

New

$263

Used

$236

MSRP New (Amazon) Used (eBay)

Comparison of Casio G-Shock, Orient Mako II
Specification	Casio G-Shock	Orient Mako II
Pricing
MSRP	$150	$230
New Price	$129	$263
Used Price (Low)	$105	$236
Used Price (High)	$866	$499
30-Day Trend	↑ +4.6%	0.0%
Used Price Range	$105 - $866	$236 - $499
Identity
Reference	GMA-S2100 (small)	FAA02001B9
Nickname	N/A	N/A
Style	Ana-Digi, Sports, Tool	Diver, Tool
Release Era	1980s	2010s
Dimensions
Diameter	42.9mm	41.5mm
Thickness	11.2mm	13mm
Lug Width	N/A	22mm
Lug to Lug	46.2mm	47mm
Movement
Movement	Quartz	Automatic
Power Reserve / Battery	N/A	N/A
Accuracy	N/A	N/A
Case
Case Material	Resin	Stainless Steel
Crystal	Mineral Crystal	Mineral Crystal
Water Resistance	200m (diving)	200m (diving)
Bezel	Fixed	Unidirectional rotating
Dial
Dial Color	Black	Black
Luminous	Yes	Yes
Community
Review Rating	N/A	N/A
In Collections	N/A	N/A
On Wishlists	N/A	N/A
Forum Threads	N/A	N/A

Which Should You Buy?

This Casio G-Shock GMA-S2100 (small) vs Orient Mako II comparison is less about a universal winner and more about mechanical feel versus low-maintenance convenience, ana-digi character versus diver versatility, entry price versus premium finishing or specs. Treat it as a value-versus-upgrade decision — confirm the extra spend solves a problem you will notice every week.

Bottom line

There is a real price gap here — treat the more expensive option as an upgrade decision and confirm whether the extra spend buys something you will notice in weekly use. Choose Casio G-Shock GMA-S2100 (small) if you want a lower-maintenance daily watch; choose Orient Mako II if you prefer a mechanical watch experience and do not mind more upkeep.

Choose Casio G-Shock GMA-S2100 (small) when

Casio G-Shock GMA-S2100 (small) is a better fit for low-maintenance daily wear, ana-digi styling.

Choose Orient Mako II when

Orient Mako II is a better fit for mechanical-watch enthusiasts, diver styling.

Key Differences

Movement and upkeep

Casio G-Shock GMA-S2100 (small): quartz movement

Orient Mako II: automatic movement

Casio G-Shock GMA-S2100 (small) uses a quartz movement, while Orient Mako II uses a automatic movement — that changes day-to-day ownership, upkeep, and the overall feel on the wrist.

Size and wearability

Casio G-Shock GMA-S2100 (small): 42.9mm · L2L 46.2mm · 41g

Orient Mako II: 41.5mm · L2L 47mm

Their size profiles are relatively close, so fit comes down to shape, weight, and how each watch sits on your wrist.

Water resistance

Casio G-Shock GMA-S2100 (small): 200m

Orient Mako II: 200m

Water resistance is similar on paper, so focus on fit, features, and price instead.

Price and value

Casio G-Shock GMA-S2100 (small): $129

Orient Mako II: $230

There is a real price gap here — treat the more expensive option as an upgrade decision and confirm whether the extra spend buys something you will notice in weekly use.

Style and use case

Casio G-Shock GMA-S2100 (small): ana-digi

Orient Mako II: diver

Casio G-Shock GMA-S2100 (small) leans more ana-digi, while Orient Mako II pulls toward diver use case — pick the one that matches how you will actually wear it.

Crystal and materials

Casio G-Shock GMA-S2100 (small): mineral crystal · resin

Orient Mako II: mineral crystal · steel

Materials are broadly similar, so finish, fit, and price will matter more than the materials list alone.

Choose Casio G-Shock GMA-S2100 (small) If...

You want a lower-maintenance daily watch.
You are specifically shopping for a ana-digi style watch.
You want the lower current entry price.

Choose Orient Mako II If...

You prefer a mechanical watch experience and do not mind more upkeep.
You are specifically shopping for a diver style watch.
You are comfortable paying more for a stronger feature set.

Price and Value Notes

Casio G-Shock GMA-S2100 (small) is often the value play at current pricing, while Orient Mako II makes more sense if you will use its extra features regularly.

There is a real price gap here — treat the more expensive option as an upgrade decision and confirm whether the extra spend buys something you will notice in weekly use.

Where to Check Deals

Check current deals on Amazon and eBay using the buttons below — listing prices, seller quality, and condition can change quickly.

Check current deals on Amazon and eBay

Prices change often, so compare the latest listings and condition options before you buy.

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Casio G-Shock

Check Price on AmazonOpens in new tab · Price may vary

Check Price on eBayFrom $136 · New & used listings

Affiliate links — WatchCompared earns a commission on qualifying purchases. This doesn't affect your price.

Orient Mako II

Check Price on AmazonOpens in new tab · Price may vary

Check Price on eBayFrom $250 · New & used listings

Affiliate links — WatchCompared earns a commission on qualifying purchases. This doesn't affect your price.

Comparison FAQ

Which movement is easier to live with day to day?

Quartz and solar models are usually easier for grab-and-go use, while automatic and manual watches appeal more to buyers who enjoy the mechanical side of watch ownership.

Which one is better for smaller wrists?

Casio G-Shock GMA-S2100 (small) — at 11.2mm thick versus 13mm it sits flatter, which matters more than the near-identical case width here.

Which is better for swimming or rough daily wear?

They are rated the same, so water resistance will not decide this. Choose on strap material and how much you mind scratching the case.

Is the more expensive one worth it?

Casio G-Shock GMA-S2100 (small) is the value pick at roughly $101 less. Pay more only if a specific difference above matters to you — otherwise the cheaper one is the smarter buy. Confirm live listings, since marketplace pricing moves.