Seiko Cal. 6388 - 728

The Seiko 6388-728 represents an important milestone in Seiko's 1977 lineup. It features a Champagne dial protected by a Hardlex crystal and offers 90m of water resistance. [seikata-wm-0c7f627b4867]

Also known as: Sumo, Navigator

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

11.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Champagne

Jewels

25j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1977

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