Seiko Cal. 4577 - 400

The Seiko 4577-400 represents an important milestone in Seiko's 1971 lineup. The Bidirectional bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-f5350af97cef]

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

36mm

Case Thickness

12.6mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Navy

Jewels

36j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1971

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