Prospex

Seiko Prospex SLA021

Prospex Marinemaster 300 '1968 reissue'

Steel
Caliber 8L35
Men's

The Seiko Prospex, reference SLA021. Below are the full specifications, plus what each part of the reference number means. If you own this reference and want to know what it is worth today, we buy it outright and appraisals are complimentary.

Inquire Tell us what you are looking for Sell us yours Complimentary appraisal Inquire about this reference Any year, dial or bracelet · we will hunt it

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GIA-trained appraisers · 20 years in downtown San Diego · 100% certified authentic

Full specifications

Case

Case material	Steel
Crystal	Sapphire
Water resistance	300m

Bezel

Bezel type	Rotating dive

Dial

Lume	LumiBrite

Movement

Movement	Caliber 8L35
Caliber	8L35
Power reserve	50 hours
Beat rate	28800 vph
Jewels	26

Reference

Wears as	Men's

How the SLA021 compares

Side by side with the other Seiko Prospex references we document. Only the specs that actually differ are listed.

SLA021 vs SARB017

Spec	SLA021	SARB017
Water resistance	300m	200m
Jewels	26	23

SLA021 vs SBDC033

Spec	SLA021	SBDC033
Water resistance	300m	200m
Jewels	26	23

SLA021 vs SBDC101

Spec	SLA021	SBDC101
Water resistance	300m	200m
Power reserve	50 hrs	70 hrs
Jewels	26	24

More Seiko Prospex references

Prospex

SARB017

Prospex

SBDC033

Prospex

SBDC101

Prospex

SBDX001

See all Seiko Prospex references ›

Common questions about the Seiko Prospex SLA021

What movement is in the SLA021?

Caliber 8L35. Power reserve is 50 hours. It beats at 28,800 vph. The movement uses 26 jewels.

Is the SLA021 water resistant?

It is rated to 300 meters, about 984 feet. That is a diving rating: it is built for scuba use, not just for getting wet. One caution that applies to every watch on this page: a water resistance figure describes a new watch with fresh gaskets. On a piece that is years past its last service, treat the rating as unknown until it has been pressure tested.

Does the SLA021 have a nickname?

Prospex Marinemaster 300 '1968 reissue'. Collector nicknames are not official Seiko names, but they are what people actually search for and what they are called across a showroom.

Does San Diego Jewelry Buyers buy the Seiko Prospex SLA021?

Yes. We buy this reference outright, and we lend against it if you would rather keep it. We are a family-owned San Diego buyer established in 2006, our appraisers are GIA-trained, and the appraisal is complimentary with no obligation to sell. You can bring it to our Gaslamp showroom at 907 Sixth Ave or start online. If you are looking to buy this reference instead, tell us and we will let you know when one comes in.

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Family-owned in San Diego since 2006
Paid on the spot, in person

Interested in a Prospex SLA021?

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Own a Prospex SLA021?

We buy this reference outright, and we lend against it. Bring it to our Gaslamp showroom or start online. Appraisals are complimentary and there is no obligation to sell.

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