Seiko Cal. 4555 - 638

The Seiko 4555-638 represents an important milestone in Seiko's 1998 lineup. With its 19mm lug width and 11.9mm profile, it sits comfortably on most wrists. [seikata-wm-afda04ff76d1]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

44mm

Case Thickness

11.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

70m

Dial Color

White

Jewels

33j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1998

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