Seiko Cal. 4556 - 678

The Seiko 4556-678 represents an important milestone in Seiko's 1975 lineup. With its 22mm lug width and 11.1mm profile, it sits comfortably on most wrists. [seikata-wm-9e1001a17dc3]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

11.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1975

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