Seiko Cal. 6638 - 933

The Seiko 6638-933 represents an important milestone in Seiko's 1989 lineup. It features a Burgundy dial protected by a Mineral crystal and offers 90m of water resistance. [seikata-wm-1a4034e8b275]

Also known as: Sumo, Emperor

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

9.0mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Burgundy

Jewels

33j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1989

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