Seiko Cal. 4487 - 388

The Seiko 4487-388 represents an important milestone in Seiko's 1991 lineup. It features a Navy dial protected by a Mineral crystal and offers 130m of water resistance. [seikata-wm-ce4f8bd5c3f6]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

34mm

Case Thickness

10.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Navy

Jewels

35j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1991

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