Seiko Cal. 6388 - 509

The Seiko 6388-509 represents an important milestone in Seiko's 1978 lineup. Powered by the 6388 caliber with 21j jewels beating at 21,600 bph, it delivers a 41 hours power reserve. [seikata-wm-784c218f67fa]

Also known as: Navigator, Emperor

Specifications

Movement

Solar

Case Material

Titanium

Case Width

35mm

Case Thickness

13.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

140m

Dial Color

Green

Jewels

21j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1978

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