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Seiko Prospex Sea

Seiko Prospex Sea

AutomaticSteel

Ref. SRPB99J1

Collection: ProspexCase size: 43.8mmMovement: 4R35

The Seiko Prospex Sea, reference SRPB99J1, is a dive watch with a 43.8 mm steel case. This is a special edition. The case measures 12.8 mm thick, with a water-resistance rating of 200 metres. Self-winding calibre 4R35 contains 23 jewels and has a power reserve of approximately 41 hours. The dial is covered by a Hardlex crystal; the dial has a date display. The clasp has a three-fold construction with push-button release and an extender. The dial has LumiBrite on the hands and indices; the lug width measures 22 mm. A screw-down crown is part of the case.

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Last updated 9 Oct 2026Suggest a correction

TECHNICAL SPECIFICATIONS

GENERAL

Gender

Men

CASE

Diameter

43.8mm

Thickness

12.8mm

Lug Width

22mm

Case Material

Steel

Water Resistance

200m

Crystal

Mineral Glass

MOVEMENT

Movement Type

Automatic

Caliber

4R35

Power Reserve

41h

Frequency

21,600 vph (3 Hz)

Jewels

23 jewels

BRACELET/STRAP

Clasp Type

Fold Clasp

FEATURES & COMPLICATIONS

DateLuminous handsLuminous indicesRotating BezelScrew-Down CrownSpecial Edition

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