Seiko Cal. 6331 - 218

The 6331-218 is a sought-after Spring Drive piece from Seiko's golden era. With its 22mm lug width and 9.7mm profile, it sits comfortably on most wrists. [seikata-wm-4b7ff390dc3f]

Also known as: Turtle, Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

9.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Silver

Jewels

22j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1979

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