Seiko Cal. 4438 - 987

This Spring Drive model from 1990 features a 36mm PVD Black case. Powered by the 4438 caliber with 24j jewels beating at 28,800 bph, it delivers a 60 hours power reserve. [seikata-wm-5fd3dc2eadeb]

Also known as: Sea Horse

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

15.9mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1990

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