Seiko Cal. 5638 - 503

This Hand-Winding model from 1993 features a 42mm Two-Tone case. With its 20mm lug width and 13.5mm profile, it sits comfortably on most wrists. [seikata-wm-3d7406e27f3c]

Also known as: Sumo, Bullhead

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

42mm

Case Thickness

13.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1993

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