Seiko Cal. 4577 - 221

The Seiko 4577-221 represents an important milestone in Seiko's 1989 lineup. It features a Navy dial protected by a Hardlex crystal and offers 160m of water resistance. [seikata-wm-428b9dbace75]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

12.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

160m

Dial Color

Navy

Jewels

35j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1989

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