Seiko Cal. 6646 - 952

The Seiko 6646-952 represents an important milestone in Seiko's 1975 lineup. With its 18mm lug width and 15.6mm profile, it sits comfortably on most wrists. [seikata-wm-7ed25f8ee915]

Also known as: Sumo, Emperor

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

15.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Champagne

Jewels

25j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1975

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