Seiko Cal. 6399 - 578

The 6399-578 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6399 caliber with 18j jewels beating at 36,000 bph, it delivers a 37 hours power reserve. [seikata-wm-538085cb7516]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

12.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Burgundy

Jewels

18j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1979

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