Seiko Cal. 5638 - 653

Released in 1991, the Cal. 5638 with design code 653 was part of Seiko's domestic market collection. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 90m of water resistance. [seikata-wm-14be7828bec8]

Also known as: Bullhead

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

39mm

Case Thickness

11.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1991

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