Seiko Cal. 4577 - 772

The Seiko 4577-772 represents an important milestone in Seiko's 1977 lineup. With its 20mm lug width and 8.0mm profile, it sits comfortably on most wrists. [seikata-wm-a4b935535c23]

Also known as: Helmet, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

8.0mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Black

Jewels

30j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1977

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