Seiko Cal. 3888 - 678

The Seiko 3888-678 represents an important milestone in Seiko's 1971 lineup. The Fixed bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-29360ba8682a]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

8.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

90m

Dial Color

Burgundy

Jewels

21j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1971

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