Seiko Cal. 6388 - 678

The Seiko 6388-678 represents an important milestone in Seiko's 1975 lineup. It features a Black dial protected by a Mineral crystal and offers 130m of water resistance. [seikata-wm-4345b288735e]

Also known as: UFO, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

130m

Dial Color

Black

Jewels

23j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1975

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