Seiko Cal. 6377 - 521

This Spring Drive model from 1983 features a 40mm Hardlex-Coated Steel case. With its 18mm lug width and 11.6mm profile, it sits comfortably on most wrists. [seikata-wm-88751e2e5c25]

Also known as: Turtle

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

11.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Green

Jewels

29j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1983

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