Seiko Cal. 6399 - 978

The Seiko 6399-978 represents an important milestone in Seiko's 1965 lineup. Powered by the 6399 caliber with 22j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-775aa3bfe633]

Also known as: Sea Horse

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

41mm

Case Thickness

9.4mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

200m

Dial Color

White

Jewels

22j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1965

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