BenlyDesign C-OPO vs Casio G-Shock GMD-S5600

Side-by-side comparison of specifications and features

BenlyDesignC-OPO

C-OPO

CasioG-Shock

GMD-S5600

Key Differences

Best Value

BenlyDesign C-OPO (45mm · Resin)

Starting from $56

Best Water Resistance

Casio G-Shock (GMD-S5600)

200m (7x more)

Slimmest

Casio G-Shock (GMD-S5600)

11mm thick

Biggest Price Drop

Casio G-Shock (GMD-S5600)

-5.4% in 30 days

Price Comparison

BenlyDesign C-OPO

MSRP

$56

Casio G-Shock

MSRP

$150

New

$110

Used

$96

MSRP New (Amazon) Used (eBay)

Comparison of BenlyDesign C-OPO, Casio G-Shock
Specification	BenlyDesign C-OPO	Casio G-Shock
Pricing
MSRP	$56	$150
New Price	N/A	$110
Used Price (Low)	N/A	$96
Used Price (High)	N/A	$340
30-Day Trend	N/A	↓ -5.4%
Used Price Range	N/A	$96 - $340
Identity
Reference	C-OPO	GMD-S5600
Nickname	N/A	N/A
Style	Tool, Ana-Digi	Digital, Sports, Tool
Release Era	N/A	1980s
Dimensions
Diameter	45mm	43.8mm
Thickness	13.3mm	11mm
Lug Width	22mm	N/A
Lug to Lug	40mm	N/A
Movement
Movement	Quartz	Quartz
Power Reserve / Battery	N/A	N/A
Accuracy	N/A	N/A
Case
Case Material	Plastic	Resin
Crystal	Mineral Crystal	Mineral Crystal
Water Resistance	30m (splash resistant)	200m (diving)
Bezel	N/A	Fixed
Dial
Dial Color	N/A	Black
Luminous	No	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

BenlyDesign C-OPO and Casio G-Shock GMD-S5600 can overlap on price or use case, but the buying decision usually comes down to wrist presence versus easier fit, water-ready utility versus dressier everyday wear, tool character versus digital versatility. Start with fit first — case width and lug-to-lug usually matter more than secondary features if wrist comfort is a concern.

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.

BenlyDesign C-OPO

BenlyDesign C-OPO is a better fit for low-maintenance daily wear, tool styling.

Casio G-Shock GMD-S5600

Casio G-Shock GMD-S5600 is a better fit for low-maintenance daily wear, digital styling.

Key Differences

Movement and upkeep

BenlyDesign C-OPO: quartz movement

Casio G-Shock GMD-S5600: 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

BenlyDesign C-OPO: 45mm · L2L 40mm

Casio G-Shock GMD-S5600: 43.8mm · 42g

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

BenlyDesign C-OPO: 30m

Casio G-Shock GMD-S5600: 200m

Water resistance is a meaningful separator here — the higher-rated option gives more flexibility for swimming or rougher daily use.

Price and value

BenlyDesign C-OPO: $56

Casio G-Shock GMD-S5600: $110

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

BenlyDesign C-OPO: tool

Casio G-Shock GMD-S5600: digital

BenlyDesign C-OPO leans more tool, while Casio G-Shock GMD-S5600 pulls toward digital use case — pick the one that matches how you will actually wear it.

Crystal and materials

BenlyDesign C-OPO: mineral crystal · plastic

Casio G-Shock GMD-S5600: mineral crystal · resin

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

Choose BenlyDesign C-OPO If...

You are specifically shopping for a tool style watch.
You want the lower current entry price.

Choose Casio G-Shock GMD-S5600 If...

Swimming, beach use, or tougher daily wear is part of the plan.
You are specifically shopping for a digital style watch.
You are comfortable paying more for a stronger feature set.

Price and Value Notes

BenlyDesign C-OPO is often the value play at current pricing, while Casio G-Shock GMD-S5600 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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BenlyDesign C-OPO

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Casio G-Shock

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Comparison FAQ

Which one is better for smaller wrists?

Casio G-Shock GMD-S5600 — at 11mm thick versus 13.3mm it sits flatter, which matters more than the near-identical case width here.

Which is better for swimming or rough daily wear?

Casio G-Shock GMD-S5600 — it is rated 200m versus 30m, which is the difference between swimming confidently and only handling splashes.

Is the more expensive one worth it?

BenlyDesign C-OPO is the value pick at roughly $54 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.