Seiko Cal. 4577 - 548

This Spring Drive model from 1991 features a 44mm Two-Tone case. With its 21mm lug width and 11.4mm profile, it sits comfortably on most wrists. [seikata-wm-8116a0b41174]

Also known as: Helmet, Arnie

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

44mm

Case Thickness

11.4mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

110m

Dial Color

Silver

Jewels

24j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1991

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