Seiko Cal. 6643 - 227

The Seiko 6643-227 represents an important milestone in Seiko's 1979 lineup. It features a Burgundy dial protected by a Mineral crystal and offers 200m of water resistance. [seikata-wm-afba00570a68]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

8.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

200m

Dial Color

Burgundy

Jewels

31j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1979

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