Seiko Cal. 6388 - 888

This Hand-Winding model from 1976 features a 37mm Two-Tone case. Powered by the 6388 caliber with 34j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-2c3b13879cb3]

Also known as: Helmet, Rally

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

15.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

140m

Dial Color

Navy

Jewels

34j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1976

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