Seiko Cal. 3897 - 678

The Seiko 3897-678 represents an important milestone in Seiko's 1975 lineup. The Rotating bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-15795310dc9a]

Also known as: Sumo, UFO

Specifications

Movement

Solar

Case Material

Titanium

Case Width

34mm

Case Thickness

9.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

110m

Dial Color

Green

Jewels

27j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1975

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