Seiko Cal. 5221 - 637

The Seiko 5221-637 represents an important milestone in Seiko's 1974 lineup. It features a Cream dial protected by a Sapphire crystal and offers 40m of water resistance. [seikata-wm-85878417e836]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

12.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Cream

Jewels

17j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1974

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