Seiko Cal. 6613 - 377

The Seiko 6613-377 represents an important milestone in Seiko's 1967 lineup. With its 19mm lug width and 11.0mm profile, it sits comfortably on most wrists. [seikata-wm-031a5f1a2b1f]

Also known as: Helmet, Bellmatic

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

11.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1967

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