Seiko Cal. 6388 - 403

The Seiko 6388-403 represents an important milestone in Seiko's 1991 lineup. It features a Black dial protected by a Sapphire crystal and offers 40m of water resistance. [seikata-wm-550bd54c96c2]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

10.3mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

40m

Dial Color

Black

Jewels

36j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1991

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