What are the case specifications of the Seiko Prospex?

The Seiko Prospex features a 45mm diameter, 13.2mm thick, Steel case with a sapphire crystal crystal.

What movement does the Seiko Prospex use?

The Seiko Prospex is powered by a Automatic, caliber 4R36, 41h power reserve.

Seiko Prospex

AutomaticSteel

Ref. SBDY137

Collection: ProspexCase size: 45mmMovement: 4R36

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Last updated 8 Oct 2026Suggest a correction

TECHNICAL SPECIFICATIONS

CASE

Diameter

45mm

Thickness

13.2mm

Lug to Lug

47.7mm

Case Material

Steel

Crystal

Sapphire Crystal

Bezel Material

Ceramic

MOVEMENT

Movement Type

Automatic

Caliber

4R36

Power Reserve

41h

Frequency

21,600 vph (3 Hz)

Jewels

24 jewels

BRACELET/STRAP

Bracelet/Strap

Silicon

FEATURES & COMPLICATIONS

DateDisplay backLimited EditionLuminous handsLuminous indicesRotating BezelScrew-Down CrownWeekday

HDB004J

AutomaticSteel

QUICK FACTS

BRAND

Seiko

REFERENCE

SBDY137

COLLECTION

Prospex

MOVEMENT

Automatic

CALIBER

4R36

CASE MATERIAL

Steel

CRYSTAL

Sapphire Crystal

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Last updated 8 Oct 2026Suggest a correction

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Seiko Prospex

TECHNICAL SPECIFICATIONS

CASE

MOVEMENT

BRACELET/STRAP

FEATURES & COMPLICATIONS

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