Casio G-Shock GMA-S2100 (small) vs Casio SGW-100-1V

Side-by-side comparison of specifications and features

CasioG-Shock

GMA-S2100 (small)

CasioSGW-100-1V

SGW-100-1V

Key Differences

Best Value

Casio SGW-100-1V (47.6mm · Resin)

Starting from $90

Slimmest

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

11.2mm thick

Price Comparison

Casio G-Shock

MSRP

$150

New

$124

Used

$107

Casio SGW-100-1V

MSRP

$90

MSRP New (Amazon) Used (eBay)

Comparison of Casio G-Shock, Casio SGW-100-1V
Specification	Casio G-Shock	Casio SGW-100-1V
Pricing
MSRP	$150	$90
New Price	$124	N/A
Used Price (Low)	$107	N/A
Used Price (High)	$866	N/A
30-Day Trend	↑ +6.6%	N/A
Used Price Range	$107 - $866	N/A
Identity
Reference	GMA-S2100 (small)	SGW-100-1V
Nickname	N/A	N/A
Style	Ana-Digi, Sports, Tool	Digital, outdoor, Tool
Release Era	1980s	2010s
Dimensions
Diameter	42.9mm	47.6mm
Thickness	11.2mm	13.2mm
Lug Width	N/A	20mm
Lug to Lug	46.2mm	51.5mm
Movement
Movement	Quartz	Quartz
Power Reserve / Battery	N/A	N/A
Accuracy	N/A	N/A
Case
Case Material	Resin	Resin
Crystal	Mineral Crystal	Mineral Crystal
Water Resistance	200m (diving)	200m (diving)
Bezel	Fixed	fixed
Dial
Dial Color	Black	black
Luminous	Yes	No
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

Quick Summary

Casio G-Shock GMA-S2100 (small) and Casio SGW-100-1V can overlap on price or use case, but the buying decision usually comes down to wrist presence versus easier fit, ana-digi character versus digital versatility. They both touch the tool use case, so smaller spec differences can matter more than brand preference.

How to choose

The biggest practical difference is usually movement and upkeep. Start with wrist fit and movement preference, then use water resistance and price to break the tie.

Casio G-Shock GMA-S2100 (small)

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

Casio SGW-100-1V

Casio SGW-100-1V is a better fit for buyers who want more wrist presence, low-maintenance daily wear, digital styling.

Key Differences

Movement and upkeep

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

Casio SGW-100-1V: quartz movement

Both use the same movement type, so maintenance differences are limited and fit or feature details should decide the purchase.

Size and wearability

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

Casio SGW-100-1V: 47.6mm · L2L 51.5mm

Fit is a real separator here — compare case width and lug-to-lug before deciding, especially if wrist comfort matters more than headline features.

Water resistance

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

Casio SGW-100-1V: 200m

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

Price and value

Casio G-Shock GMA-S2100 (small): $124

Casio SGW-100-1V: $90

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

Casio SGW-100-1V: digital

Casio G-Shock GMA-S2100 (small) leans more ana-digi, while Casio SGW-100-1V pulls toward digital 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

Casio SGW-100-1V: mineral crystal · resin

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 smaller case footprint on the wrist.
You are specifically shopping for a ana-digi style watch.
You are comfortable paying more for a stronger feature set.

Choose Casio SGW-100-1V If...

You prefer more dial presence and a larger case feel.
You are specifically shopping for a digital style watch.
You want the lower current entry price.

Price and Value Notes

Casio SGW-100-1V is often the value play at current pricing, while Casio G-Shock GMA-S2100 (small) 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 $140 · Live listings

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Casio SGW-100-1V

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Comparison FAQ

Which one is better for smaller wrists?

Casio G-Shock GMA-S2100 (small) — it is 46.2mm lug-to-lug versus 51.5mm, and lug-to-lug is what decides whether a watch overhangs a smaller wrist.

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 SGW-100-1V is the value pick at roughly $34 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.