Seiko Prospex vs Seiko Prospex Turtle

Side-by-side comparison of specifications and features

SeikoProspex

SRPD71 (Mini Turtle)

SeikoProspex Turtle

SRP777

Key Differences

Best Value

Seiko Prospex (Ref. SRPD71 (Mini Turtle))

Starting from $350

Biggest Price Drop

Seiko Prospex Turtle (SRP777)

-5.3% in 30 days

Price Comparison

Seiko Prospex

MSRP

$350

New

$485

Used

$320

Seiko Prospex Turtle

MSRP

$625

New

$708

Used

$450

MSRP New (Amazon) Used (eBay)

Comparison of Seiko Prospex, Seiko Prospex Turtle
Specification	Seiko Prospex	Seiko Prospex Turtle
Pricing
MSRP	$350	$625
New Price	$485	$708
Used Price (Low)	$320	$450
Used Price (High)	$3,695	$805
30-Day Trend	↑ +3.8%	↓ -5.3%
Used Price Range	$320 - $3,695	$450 - $805
Identity
Reference	SRPD71 (Mini Turtle)	SRP777
Nickname	N/A	N/A
Style	Diver, Sports	Diver, Tool
Release Era	2000s	2010s
Dimensions
Diameter	42.3mm	45mm
Thickness	N/A	13.4mm
Lug Width	N/A	22mm
Lug to Lug	N/A	48mm
Movement
Movement	Automatic	Automatic
Power Reserve / Battery	N/A	N/A
Accuracy	N/A	N/A
Case
Case Material	Stainless Steel	Stainless Steel
Crystal	Hardlex	Hardlex
Water Resistance	200m (diving)	200m (diving)
Bezel	Unidirectional rotating	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

Quick Summary

Seiko Prospex and Seiko Prospex Turtle can overlap on price or use case, but the buying decision usually comes down to wrist presence versus easier fit, entry price versus premium finishing or specs. 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.

Seiko Prospex

Seiko Prospex is a better fit for smaller wrists, mechanical-watch enthusiasts, diver styling.

Seiko Prospex Turtle

Seiko Prospex Turtle is a better fit for buyers who want more wrist presence, mechanical-watch enthusiasts, diver styling.

Key Differences

Movement and upkeep

Seiko Prospex: automatic movement

Seiko Prospex Turtle: automatic movement

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

Size and wearability

Seiko Prospex: 42.3mm

Seiko Prospex Turtle: 45mm · L2L 48mm

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

Seiko Prospex: 200m

Seiko Prospex Turtle: 200m

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

Price and value

Seiko Prospex: $350

Seiko Prospex Turtle: $625

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

Seiko Prospex: diver

Seiko Prospex Turtle: diver

Both lean into a similar diver use case — the choice is more about fit, features, and price than category.

Crystal and materials

Seiko Prospex: Hardlex crystal · steel

Seiko Prospex Turtle: Hardlex crystal · steel

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

Choose Seiko Prospex If...

You want a smaller case footprint on the wrist.
You want the lower current entry price.

Choose Seiko Prospex Turtle If...

You prefer more dial presence and a larger case feel.
You are comfortable paying more for a stronger feature set.

Price and Value Notes

Seiko Prospex is often the value play at current pricing, while Seiko Prospex Turtle 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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Seiko Prospex

Check Price on AmazonOpens in new tab · Price may vary

Check Price on eBayFrom $466 · Live listings

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Seiko Prospex Turtle

Check Price on AmazonOpens in new tab · Price may vary

Check Price on eBayFrom $603 · Live listings

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

Comparison FAQ

Which one is better for smaller wrists?

Start with case width and lug-to-lug. The watch that looks smaller on paper is often the safer choice, but lug shape and thickness still affect how it wears.

Which is better for swimming or rough daily wear?

Use the water resistance row as the first filter. Higher ratings generally give more flexibility for swimming and water exposure, but strap choice and overall condition still matter.

Should I choose based on price alone?

Price matters, but the better buy is the watch that matches your fit, feature priorities, and use case. Check live listings first, then decide whether the price gap actually changes the ownership experience.