Seiko Cal. 4577 - 310

The Seiko 4577-310 represents an important milestone in Seiko's 1991 lineup. With its 18mm lug width and 13.6mm profile, it sits comfortably on most wrists. [seikata-wm-191a3e9f1f80]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

13.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

170m

Dial Color

White

Jewels

28j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1991

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