Seiko Seiko Prospex Marinemaster Watch 44.3mm SLA021J1

Direct answer: Seiko Seiko Prospex Marinemaster Watch 44.3mm SLA021J1 is a Seiko watch, from the Prospex collection, with reference SLA021J1. This page brings together 20 recorded specification fields, 5 locally stored images so you can check the exact record before comparing another watch.

Seiko

Reference SLA021J1

$3,149.99

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Evidence Available for This Reference

This record includes 20 recorded specification fields and 5 locally stored images.

See the catalog methodology for how recorded evidence, missing fields and search eligibility are handled.

Reference-specific facts recorded for this watch

  • Material: Stainless Steel
  • Back: Solid
  • Crystal: Scratch Resistant Sapphire
  • Diameter: 44.3 mm

Recorded entity relationships

  • Brand relationship: Seiko Seiko Prospex Marinemaster Watch 44.3mm SLA021J1 is recorded as a Seiko watch.
  • Collection relationship: Seiko Seiko Prospex Marinemaster Watch 44.3mm SLA021J1 belongs to the recorded Prospex collection.
  • Reference relationship: The catalog links reference SLA021J1 to this exact watch record.
  • Movement: The catalog lists 8L35 as the movement type.
  • Case: The recorded case material is Steel.
  • Size: The recorded case diameter is 44.3 mm.
  • Dial: The catalog describes the dial as Black.
  • Band: The recorded band or bracelet material is Stainless Steel.

What the recorded details mean

Seiko Seiko Prospex Marinemaster Watch 44.3mm SLA021J1 uses 8L35. The listed caliber is 8L35. Movement details help you plan daily use and future service.

The recorded case measurements are 44.3 mm. Size is only a starting point, so also check lug length and bracelet fit.

The case is recorded as Steel. Material affects weight, finish, care, and how marks may appear over time.

The catalog lists 300 m for water resistance. This recorded value is not a new pressure test, so have the seals checked before water use.

Available Catalog Details

This catalog record identifies the Seiko Seiko Prospex Marinemaster Watch 44.3mm SLA021J1 under reference SLA021J1. A complete product description is not available, so WatchShopping does not substitute specifications from a similar watch.

Specifications

Information: Brand
Seiko
Information: Series
Prospex
Information: Model
SLA021J1
Information: Gender
M
Dial: Colour
Black
Dial: Indexes
Index
Case: Material
Steel
Case: Crystal
Scratch Resistant Sapphire
Case: Back
Solid
Case: Shape
Round
Case: Diameter
44.3 mm
Case: Lug Width
20 mm
Movement: Calibre
8L35
Movement: Type
Automatic
Movement: Jewels
26
Movement: Reserve
50 hours when fully wound
Movement: Frequency
28800 vph
Band: Material
Stainless Steel
Features: Water Resistance
300 m
Features: Watch Features
Stainless Steel, Analog

How to Compare This Reference

Use the complete reference SLA021J1 when comparing this watch. Confirm that the dial, case, movement, bracelet or strap, and production period match the exact configuration under review.

Check the watch in this order

  1. Match the full name and reference SLA021J1 to the watch you are reviewing.
  2. Compare the dial, case, crown, bezel, and bracelet or strap with the stored images.
  3. Check the recorded movement and caliber against reliable documents for the same production period.
  4. Confirm current condition, service history, included parts, price, and availability before making a decision.

Research tip: Search and compare with the full reference SLA021J1. A family name alone can mix different sizes, movements, and materials.

Continue Your Watch Research

Compare this reference with watch catalog, then read watch case materials guide for practical buying and ownership guidance.

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