Seiko Cal. 5646 - 198

The Seiko 5646-198 represents an important milestone in Seiko's 1968 lineup. The Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-25a515c3d004]

Also known as: Sumo, Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

13.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

200m

Dial Color

Silver

Jewels

21j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1968

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