Seiko Cal. 6381 - 599

The Seiko 6381-599 represents an important milestone in Seiko's 1965 lineup. Powered by the 6381 caliber with 28j jewels beating at 28,800 bph, it delivers a 70 hours power reserve. [seikata-wm-39ea1235d0e7]

Also known as: Tuna, Bellmatic

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

14.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Green

Jewels

28j

Frequency

28,800 bph

Power Reserve

70 hours

Year

1965

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